From 14ff58bcecb616d635d26eaa6be28d7c638caaf1 Mon Sep 17 00:00:00 2001
From: Andrew Kent <andrew@braintrustdata.com>
Date: Sun, 29 Mar 2026 23:29:31 -0600
Subject: [PATCH] VCR

---
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 565 files changed, 9057 insertions(+), 7558 deletions(-)
 create mode 100644 test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-12bb6b8f-daf2-4c8d-99a0-8f5258653e83.json
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 rename test-harness/src/testFixtures/resources/cassettes/google/mappings/{v1beta_models_gemini-20-flash-litegeneratecontent-a3ac84ad-7e12-4fac-9732-3622e4959c01.json => v1beta_models_gemini-2.0-flash-litegeneratecontent-9c58a8f9-e6f9-4f5a-921e-cd67c5f91820.json} (63%)
 rename test-harness/src/testFixtures/resources/cassettes/google/mappings/{v1beta_models_gemini-20-flash-litegeneratecontent-1c3e0394-1e3e-48e2-bd68-e030c1edc508.json => v1beta_models_gemini-2.0-flash-litegeneratecontent-c270a989-b89b-4e99-950f-7981f359e598.json} (63%)
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 rename test-harness/src/testFixtures/resources/cassettes/openai/mappings/{chat_completions-22dbf888-ee29-4f5e-962b-b3e5eebb9960.json => chat_completions-9819566d-fadf-4f70-a8f6-75f778f99918.json} (57%)
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diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-12bb6b8f-daf2-4c8d-99a0-8f5258653e83.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-12bb6b8f-daf2-4c8d-99a0-8f5258653e83.json
new file mode 100644
index 00000000..bd8215f5
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-12bb6b8f-daf2-4c8d-99a0-8f5258653e83.json
@@ -0,0 +1 @@
+{"model":"claude-3-haiku-20240307","id":"msg_015ggE6DMWDn4xQCdVcWPb49","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":14,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-161ff70a-c4a2-4379-bc69-8f73b0fa6ac7.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-161ff70a-c4a2-4379-bc69-8f73b0fa6ac7.json
new file mode 100644
index 00000000..6e7fed3f
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-161ff70a-c4a2-4379-bc69-8f73b0fa6ac7.json
@@ -0,0 +1 @@
+{"model":"claude-haiku-4-5-20251001","id":"msg_01BixXKgMqHfV8Jz1ENwHqfp","type":"message","role":"assistant","content":[{"type":"text","text":"This image appears to be **red** (or a reddish color). It looks like a small red dot or mark against a white background."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":17,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":33,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-163b371b-f5f0-4e1d-8564-aeb1a452329e.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-163b371b-f5f0-4e1d-8564-aeb1a452329e.json
deleted file mode 100644
index 3ea61c14..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-163b371b-f5f0-4e1d-8564-aeb1a452329e.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_011YexbvYrhWJjD4kiTMSPn4","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-17680b84-4d29-4d65-8473-9e046e3720d7.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-17680b84-4d29-4d65-8473-9e046e3720d7.json
deleted file mode 100644
index 05cce7bd..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-17680b84-4d29-4d65-8473-9e046e3720d7.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_01TLR7nVnZSSuk7EV5zwUMN2","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-1f4e5f7d-1ba9-41aa-b26a-ede57e72baa0.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-1f4e5f7d-1ba9-41aa-b26a-ede57e72baa0.json
new file mode 100644
index 00000000..8a651f33
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-1f4e5f7d-1ba9-41aa-b26a-ede57e72baa0.json
@@ -0,0 +1 @@
+{"model":"claude-haiku-4-5-20251001","id":"msg_01MmDSJAZ3nMoRCWauqztGC9","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":20,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-209da0d9-7370-4740-9503-981c835fda24.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-209da0d9-7370-4740-9503-981c835fda24.json
deleted file mode 100644
index 0d5a29ad..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-209da0d9-7370-4740-9503-981c835fda24.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_01FcFjeuPmcHRba7NfnotJVq","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":14,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-22f11bf1-a6fb-4733-86b9-42bd18ee37ee.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-22f11bf1-a6fb-4733-86b9-42bd18ee37ee.json
deleted file mode 100644
index 172580d9..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-22f11bf1-a6fb-4733-86b9-42bd18ee37ee.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_014eXq1R2mamAEsBb1EsNMMo","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-2d588166-5193-482c-adb8-f0f5b04240c1.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-2d588166-5193-482c-adb8-f0f5b04240c1.txt
new file mode 100644
index 00000000..0b691c48
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-2d588166-5193-482c-adb8-f0f5b04240c1.txt
@@ -0,0 +1,24 @@
+event: message_start
+data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_01DbF9vkxiRYm2nVYAe2pagc","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}  }
+
+event: content_block_start
+data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}             }
+
+event: ping
+data: {"type": "ping"}
+
+event: content_block_delta
+data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}   }
+
+event: content_block_delta
+data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is Paris."}   }
+
+event: content_block_stop
+data: {"type":"content_block_stop","index":0         }
+
+event: message_delta
+data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null,"stop_details":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}             }
+
+event: message_stop
+data: {"type":"message_stop"            }
+
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-3a44dc7b-7c58-42c6-a05b-9701cde28008.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-3a44dc7b-7c58-42c6-a05b-9701cde28008.json
deleted file mode 100644
index 035955d4..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-3a44dc7b-7c58-42c6-a05b-9701cde28008.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_0159ZtRK2GNuYXy6No1Qf8vL","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-3cf94b89-b7f2-4925-97c7-b592da1c7128.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-3cf94b89-b7f2-4925-97c7-b592da1c7128.json
deleted file mode 100644
index 6b9e412d..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-3cf94b89-b7f2-4925-97c7-b592da1c7128.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_017XJT434iB9eNe9P1MKbjWG","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-409d6eae-0222-40f5-8c25-f85fed3083e7.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-409d6eae-0222-40f5-8c25-f85fed3083e7.txt
deleted file mode 100644
index 1f9c7741..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-409d6eae-0222-40f5-8c25-f85fed3083e7.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_01UcVw5riM3WHwWgRmqZkX8s","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}}
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}    }
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is"}           }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."}     }
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0       }
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}  }
-
-event: message_stop
-data: {"type":"message_stop"               }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-44f66b34-c858-4ac0-8a76-a15873892386.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-44f66b34-c858-4ac0-8a76-a15873892386.json
deleted file mode 100644
index eed2ea11..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-44f66b34-c858-4ac0-8a76-a15873892386.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_01LtYGTdQzFDkqm5TfaEnm8T","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-47082d84-2083-4057-891f-48f77e246b16.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-47082d84-2083-4057-891f-48f77e246b16.txt
new file mode 100644
index 00000000..79470fe2
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-47082d84-2083-4057-891f-48f77e246b16.txt
@@ -0,0 +1,21 @@
+event: message_start
+data: {"type":"message_start","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01PrQnDF15HSuzTLa51WB9fg","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":22,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}               }
+
+event: content_block_start
+data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}         }
+
+event: ping
+data: {"type": "ping"}
+
+event: content_block_delta
+data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"1\n2\n3\n4\n5"}     }
+
+event: content_block_stop
+data: {"type":"content_block_stop","index":0      }
+
+event: message_delta
+data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null,"stop_details":null},"usage":{"input_tokens":22,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":13}      }
+
+event: message_stop
+data: {"type":"message_stop"    }
+
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-491eefc7-3731-4f09-8d82-ae822cb5f000.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-491eefc7-3731-4f09-8d82-ae822cb5f000.txt
deleted file mode 100644
index 582101fb..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-491eefc7-3731-4f09-8d82-ae822cb5f000.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-5-haiku-20241022","id":"msg_01XrJ57QAWoMKTtrBNLzXQTS","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":5,"service_tier":"standard","inference_geo":"not_available"}}               }
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}     }
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The capital of France is"}       }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."}   }
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0         }
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}    }
-
-event: message_stop
-data: {"type":"message_stop"             }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-4a7e3600-3b68-4c2e-b906-e51f3637d5f5.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-4a7e3600-3b68-4c2e-b906-e51f3637d5f5.txt
new file mode 100644
index 00000000..d6542f61
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-4a7e3600-3b68-4c2e-b906-e51f3637d5f5.txt
@@ -0,0 +1,24 @@
+event: message_start
+data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_014Sgg6HXXAE1tfUMKnZb94b","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}               }
+
+event: content_block_start
+data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}         }
+
+event: ping
+data: {"type": "ping"}
+
+event: content_block_delta
+data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}        }
+
+event: content_block_delta
+data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is Paris."}  }
+
+event: content_block_stop
+data: {"type":"content_block_stop","index":0           }
+
+event: message_delta
+data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null,"stop_details":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}           }
+
+event: message_stop
+data: {"type":"message_stop" }
+
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-4f0b5ed5-27e9-4320-be33-b0bd8da32323.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-4f0b5ed5-27e9-4320-be33-b0bd8da32323.txt
deleted file mode 100644
index cbd6e78e..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-4f0b5ed5-27e9-4320-be33-b0bd8da32323.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_01N43RKevLf89tMvKnUi24Uh","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}               }
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}      }
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}               }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is"}     }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."}              }
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0             }
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}          }
-
-event: message_stop
-data: {"type":"message_stop"         }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-573656d9-4187-49ad-80f1-ab5282de3f99.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-573656d9-4187-49ad-80f1-ab5282de3f99.json
deleted file mode 100644
index 32d2d4f8..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-573656d9-4187-49ad-80f1-ab5282de3f99.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-5-haiku-20241022","id":"msg_01U6NkiCxvqS2CdTVLYxxfsc","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-5b575537-813b-4fd0-ac6f-27285f2caa6d.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-5b575537-813b-4fd0-ac6f-27285f2caa6d.txt
new file mode 100644
index 00000000..99db91c1
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-5b575537-813b-4fd0-ac6f-27285f2caa6d.txt
@@ -0,0 +1,24 @@
+event: message_start
+data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_01Gwb3fb5rQmXS3f9mpjimsG","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":14,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}}
+
+event: content_block_start
+data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}  }
+
+event: ping
+data: {"type": "ping"}
+
+event: content_block_delta
+data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"} }
+
+event: content_block_delta
+data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is Paris."}         }
+
+event: content_block_stop
+data: {"type":"content_block_stop","index":0            }
+
+event: message_delta
+data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null,"stop_details":null},"usage":{"input_tokens":14,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}     }
+
+event: message_stop
+data: {"type":"message_stop"            }
+
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-672a77ea-d101-4894-99d2-91ee1d4579e4.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-672a77ea-d101-4894-99d2-91ee1d4579e4.json
new file mode 100644
index 00000000..bb2e4f57
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-672a77ea-d101-4894-99d2-91ee1d4579e4.json
@@ -0,0 +1 @@
+{"model":"claude-3-haiku-20240307","id":"msg_01DBHieqe8LhQqugQyEAdvXR","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-6ba9356c-fcde-4279-95e0-9dc0c0d27dc7.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-6ba9356c-fcde-4279-95e0-9dc0c0d27dc7.txt
deleted file mode 100644
index 73131543..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-6ba9356c-fcde-4279-95e0-9dc0c0d27dc7.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_01SXGWWDFXnzKFNY4PVKoBZJ","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}       }
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}             }
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}      }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is"}          }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."}     }
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0   }
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}}
-
-event: message_stop
-data: {"type":"message_stop"        }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-6e3b67ab-fb16-4353-aa3b-da0b5a10658a.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-6e3b67ab-fb16-4353-aa3b-da0b5a10658a.json
new file mode 100644
index 00000000..5c4d9168
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-6e3b67ab-fb16-4353-aa3b-da0b5a10658a.json
@@ -0,0 +1 @@
+{"model":"claude-3-haiku-20240307","id":"msg_01ACiiYfEwrpWidaEnSwwoxh","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-7078924e-9396-4b07-885c-23d7d0c80090.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-7078924e-9396-4b07-885c-23d7d0c80090.json
deleted file mode 100644
index d9ea05f8..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-7078924e-9396-4b07-885c-23d7d0c80090.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_01AGLvWk4TyUBNQp7j6mxQAr","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-759ba9d9-fbff-4177-8666-aac06350c678.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-759ba9d9-fbff-4177-8666-aac06350c678.json
deleted file mode 100644
index 0a7f5b65..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-759ba9d9-fbff-4177-8666-aac06350c678.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_01CAMBeBp5XNAMsNMYW5yFpt","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-7b66b6a7-2d16-4e55-b2c0-47f225d0d8a1.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-7b66b6a7-2d16-4e55-b2c0-47f225d0d8a1.json
new file mode 100644
index 00000000..b4eb99ac
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-7b66b6a7-2d16-4e55-b2c0-47f225d0d8a1.json
@@ -0,0 +1 @@
+{"model":"claude-haiku-4-5-20251001","id":"msg_01NcuqTAv4tGS3uewJA95kJw","type":"message","role":"assistant","content":[{"type":"text","text":"This image appears to be **red** (or a reddish color). It looks like a small red dot or mark against a white background."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":17,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":33,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-7b8cac9c-793a-4dc7-8d7d-71d773210345.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-7b8cac9c-793a-4dc7-8d7d-71d773210345.json
deleted file mode 100644
index d7f2181b..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-7b8cac9c-793a-4dc7-8d7d-71d773210345.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_01XgwSG9nF2hoJowGS2rDsuB","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-80eb9d92-57cb-4538-ae33-4971b4f0717b.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-80eb9d92-57cb-4538-ae33-4971b4f0717b.txt
new file mode 100644
index 00000000..d4c8e950
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-80eb9d92-57cb-4538-ae33-4971b4f0717b.txt
@@ -0,0 +1,21 @@
+event: message_start
+data: {"type":"message_start","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01SNPcXzhzJp9T8ims9FRPQr","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":22,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}               }
+
+event: content_block_start
+data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}     }
+
+event: ping
+data: {"type": "ping"}
+
+event: content_block_delta
+data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"1\n2\n3\n4\n5"}     }
+
+event: content_block_stop
+data: {"type":"content_block_stop","index":0 }
+
+event: message_delta
+data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null,"stop_details":null},"usage":{"input_tokens":22,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":13}        }
+
+event: message_stop
+data: {"type":"message_stop"}
+
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-863c176a-4dbe-4c8f-a5a4-b4240172c3e6.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-863c176a-4dbe-4c8f-a5a4-b4240172c3e6.json
new file mode 100644
index 00000000..6c4bd00a
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-863c176a-4dbe-4c8f-a5a4-b4240172c3e6.json
@@ -0,0 +1 @@
+{"model":"claude-haiku-4-5-20251001","id":"msg_01MsVBgb5izWHn7VWpBFJRg1","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":20,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-87b2b5f3-b093-475f-bbde-1ab031e72500.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-87b2b5f3-b093-475f-bbde-1ab031e72500.txt
deleted file mode 100644
index 5a13aa86..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-87b2b5f3-b093-475f-bbde-1ab031e72500.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_018KNQMecVBYHNVfL8pAU8Yv","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}} }
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}               }
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}              }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is"}         }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."}   }
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0      }
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}              }
-
-event: message_stop
-data: {"type":"message_stop"       }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-87ebefc6-6fa9-4e6f-aa0b-665450656a60.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-87ebefc6-6fa9-4e6f-aa0b-665450656a60.json
deleted file mode 100644
index 0b4aa294..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-87ebefc6-6fa9-4e6f-aa0b-665450656a60.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_01WdD4ocbqtZbkLfywS52wPk","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":21,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-893a66cc-08d6-423f-bda1-720822c1f022.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-893a66cc-08d6-423f-bda1-720822c1f022.json
deleted file mode 100644
index fbb6bd30..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-893a66cc-08d6-423f-bda1-720822c1f022.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_01YCJPuDzFCvEicDLEzMCt3k","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-91a6d654-41ea-41c3-8205-e1e5123246a8.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-91a6d654-41ea-41c3-8205-e1e5123246a8.txt
deleted file mode 100644
index 76f59ceb..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-91a6d654-41ea-41c3-8205-e1e5123246a8.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_016BPKsdADqAch2QN3Lr3iL8","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}   }
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}              }
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}     }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is"}             }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."}   }
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0 }
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}         }
-
-event: message_stop
-data: {"type":"message_stop"              }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-9232af2f-2a7b-4d67-af05-fcc609fd5466.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-9232af2f-2a7b-4d67-af05-fcc609fd5466.txt
deleted file mode 100644
index ef3e6e60..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-9232af2f-2a7b-4d67-af05-fcc609fd5466.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_011cU9tVFheHT7zs7E5XB2ad","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}               }
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}}
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}               }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is"}         }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."}           }
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0          }
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}       }
-
-event: message_stop
-data: {"type":"message_stop"           }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-b437c5ce-d528-4f0d-80f2-01cd5d7ba72e.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-b437c5ce-d528-4f0d-80f2-01cd5d7ba72e.txt
deleted file mode 100644
index 6c9507b0..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-b437c5ce-d528-4f0d-80f2-01cd5d7ba72e.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_01HmbabrdFy4BV1LjsaQHvLz","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}       }
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}    }
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}            }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is"}       }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."}    }
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0           }
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}          }
-
-event: message_stop
-data: {"type":"message_stop"         }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-b7750859-35f1-4f31-a04e-cd9743b96fbb.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-b7750859-35f1-4f31-a04e-cd9743b96fbb.json
new file mode 100644
index 00000000..8e53dbef
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-b7750859-35f1-4f31-a04e-cd9743b96fbb.json
@@ -0,0 +1 @@
+{"model":"claude-3-haiku-20240307","id":"msg_01LcRMJFsgDaCjxeta7UrRo9","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":21,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-3e84b268-5860-4614-9b16-27bc47be967c.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-bdea12a4-6f59-4111-b44d-4c457b7dcf45.txt
similarity index 52%
rename from test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-3e84b268-5860-4614-9b16-27bc47be967c.txt
rename to test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-bdea12a4-6f59-4111-b44d-4c457b7dcf45.txt
index 1e2ba4cb..1cb75f77 100644
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-3e84b268-5860-4614-9b16-27bc47be967c.txt
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-bdea12a4-6f59-4111-b44d-4c457b7dcf45.txt
@@ -1,5 +1,5 @@
 event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_01UhmrPmEjEDcUKnakW45ptP","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}    }
+data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_019ge1CVkgcbjyBPYF8hQeSU","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}        }
 
 event: content_block_start
 data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}          }
@@ -8,19 +8,16 @@ event: ping
 data: {"type": "ping"}
 
 event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}          }
+data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}               }
 
 event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is"}        }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."} }
+data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is Paris."}           }
 
 event: content_block_stop
 data: {"type":"content_block_stop","index":0           }
 
 event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}        }
+data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null,"stop_details":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}         }
 
 event: message_stop
 data: {"type":"message_stop"             }
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-ca81e846-884a-484e-a88b-e76ce1670233.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-ca81e846-884a-484e-a88b-e76ce1670233.json
new file mode 100644
index 00000000..93b40f10
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-ca81e846-884a-484e-a88b-e76ce1670233.json
@@ -0,0 +1 @@
+{"model":"claude-3-haiku-20240307","id":"msg_016fvcYYLAMgm9Hqog5gwPvb","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-cf2b874d-3585-481a-b023-49e23a1d3b46.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-cf2b874d-3585-481a-b023-49e23a1d3b46.txt
deleted file mode 100644
index 3e3bb712..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-cf2b874d-3585-481a-b023-49e23a1d3b46.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_013CqiP2vx2hE1GTsrpX8a64","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}    }
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}              }
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}     }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is"}           }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."}            }
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0               }
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}             }
-
-event: message_stop
-data: {"type":"message_stop"           }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-da340447-86ca-40db-90b6-89c169f2eb65.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-da340447-86ca-40db-90b6-89c169f2eb65.json
deleted file mode 100644
index 9b171bac..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-da340447-86ca-40db-90b6-89c169f2eb65.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_01MyXBqj7z6pwUXqQ2hZJmgd","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-dc027840-62bc-4d7f-b133-7cb6488d1087.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-dc027840-62bc-4d7f-b133-7cb6488d1087.json
deleted file mode 100644
index 0e1d7643..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-dc027840-62bc-4d7f-b133-7cb6488d1087.json
+++ /dev/null
@@ -1 +0,0 @@
-{"model":"claude-3-haiku-20240307","id":"msg_017WwtpAKUrtjVECTi3hjmJq","type":"message","role":"assistant","content":[{"type":"text","text":"The capital of France is Paris."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":10,"service_tier":"standard","inference_geo":"not_available"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-de38eab2-9108-4498-9500-528b99d30d6f.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-de38eab2-9108-4498-9500-528b99d30d6f.txt
deleted file mode 100644
index 8e8ba522..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-de38eab2-9108-4498-9500-528b99d30d6f.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_01HboCSLUz2jNuR2pXPJPhTP","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}  }
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}        }
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}            }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is"}            }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" Paris."}        }
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0       }
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":19,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}             }
-
-event: message_stop
-data: {"type":"message_stop"             }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-fb58e44c-ab06-4f85-a6fd-e0e982440750.txt b/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-fb58e44c-ab06-4f85-a6fd-e0e982440750.txt
deleted file mode 100644
index 87c34cb9..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/__files/v1_messages-fb58e44c-ab06-4f85-a6fd-e0e982440750.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-event: message_start
-data: {"type":"message_start","message":{"model":"claude-3-haiku-20240307","id":"msg_019ae7Li81juf2pUqzeSH5sX","type":"message","role":"assistant","content":[],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":14,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}}          }
-
-event: content_block_start
-data: {"type":"content_block_start","index":0,"content_block":{"type":"text","text":""}            }
-
-event: ping
-data: {"type": "ping"}
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"The"}        }
-
-event: content_block_delta
-data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":" capital of France is Paris."}}
-
-event: content_block_stop
-data: {"type":"content_block_stop","index":0}
-
-event: message_delta
-data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"input_tokens":14,"cache_creation_input_tokens":0,"cache_read_input_tokens":0,"output_tokens":10}      }
-
-event: message_stop
-data: {"type":"message_stop"               }
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-209da0d9-7370-4740-9503-981c835fda24.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-12bb6b8f-daf2-4c8d-99a0-8f5258653e83.json
similarity index 62%
rename from test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-209da0d9-7370-4740-9503-981c835fda24.json
rename to test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-12bb6b8f-daf2-4c8d-99a0-8f5258653e83.json
index 39dde8fe..a75ebe0c 100644
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-209da0d9-7370-4740-9503-981c835fda24.json
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-12bb6b8f-daf2-4c8d-99a0-8f5258653e83.json
@@ -1,5 +1,5 @@
 {
-  "id" : "209da0d9-7370-4740-9503-981c835fda24",
+  "id" : "12bb6b8f-daf2-4c8d-99a0-8f5258653e83",
   "name" : "v1_messages",
   "request" : {
     "url" : "/v1/messages",
@@ -17,37 +17,37 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_messages-209da0d9-7370-4740-9503-981c835fda24.json",
+    "bodyFileName" : "v1_messages-12bb6b8f-daf2-4c8d-99a0-8f5258653e83.json",
     "headers" : {
       "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "x-envoy-upstream-service-time" : "1213",
+      "x-envoy-upstream-service-time" : "365",
       "Server" : "cloudflare",
       "vary" : "Accept-Encoding",
       "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-24T05:21:45Z",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-24T05:21:44Z",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:06:41Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:06:41Z",
       "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "set-cookie" : "_cfuvid=SfatMCW.D1A2Fv5E6LO8UorXXYvSYha4BeWxBt4XbK4-1774329704.1853507-1.0.1.1-HRCQ50BqTgyb8EPRktwVvuJvVOq_la2tBxdDCq8NUJw; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "set-cookie" : "_cfuvid=sdBOTGzIiIgI_3HXpoDMbWGMz9q_yBLJn.qNwhiPgug-1775682401.4570124-1.0.1.1-P5qkCJ3bKh4Yb9591rUyQ4DXs_UpSDZFv9oVAFVcH1o; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
       "anthropic-ratelimit-requests-limit" : "10000",
       "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "server-timing" : "x-originResponse;dur=1214",
+      "server-timing" : "x-originResponse;dur=367",
       "anthropic-ratelimit-input-tokens-remaining" : "8000000",
       "anthropic-ratelimit-requests-remaining" : "9999",
       "Content-Type" : "application/json",
-      "CF-RAY" : "9e133beb28dfdef0-SEA",
+      "CF-RAY" : "9e943cc11e9527ea-SEA",
       "anthropic-ratelimit-tokens-limit" : "9500000",
       "cf-cache-status" : "DYNAMIC",
-      "request-id" : "req_011CZMLvED4NXVV2Z7jdwvZ4",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-24T05:21:44Z",
+      "request-id" : "req_011CZrz7N459GL9VWwd7smn2",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:06:41Z",
       "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "Date" : "Tue, 24 Mar 2026 05:21:45 GMT",
+      "Date" : "Wed, 08 Apr 2026 21:06:41 GMT",
       "X-Robots-Tag" : "none",
-      "anthropic-ratelimit-requests-reset" : "2026-03-24T05:21:44Z",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:06:41Z",
       "anthropic-ratelimit-input-tokens-limit" : "8000000",
       "anthropic-ratelimit-output-tokens-remaining" : "1500000"
     }
   },
-  "uuid" : "209da0d9-7370-4740-9503-981c835fda24",
+  "uuid" : "12bb6b8f-daf2-4c8d-99a0-8f5258653e83",
   "persistent" : true,
-  "insertionIndex" : 26
+  "insertionIndex" : 14
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-161ff70a-c4a2-4379-bc69-8f73b0fa6ac7.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-161ff70a-c4a2-4379-bc69-8f73b0fa6ac7.json
new file mode 100644
index 00000000..e1f0ddb6
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-161ff70a-c4a2-4379-bc69-8f73b0fa6ac7.json
@@ -0,0 +1,53 @@
+{
+  "id" : "161ff70a-c4a2-4379-bc69-8f73b0fa6ac7",
+  "name" : "v1_messages",
+  "request" : {
+    "url" : "/v1/messages",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"max_tokens\":128,\"messages\":[{\"content\":[{\"text\":\"What color is this image?\",\"type\":\"text\"},{\"source\":{\"data\":\"iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8DwHwAFBQIAX8jx0gAAAABJRU5ErkJggg==\",\"media_type\":\"image/png\",\"type\":\"base64\"},\"type\":\"image\"}],\"role\":\"user\"}],\"model\":\"claude-haiku-4-5-20251001\",\"temperature\":0.0}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_messages-161ff70a-c4a2-4379-bc69-8f73b0fa6ac7.json",
+    "headers" : {
+      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "995",
+      "Server" : "cloudflare",
+      "vary" : "Accept-Encoding",
+      "anthropic-ratelimit-output-tokens-limit" : "800000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:03:15Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:03:15Z",
+      "anthropic-ratelimit-tokens-remaining" : "4800000",
+      "set-cookie" : "_cfuvid=.9fIBaRCOqeu_S8_yy0YRAeDxUSCIzyQQ9XOj7IxyLQ-1775682194.5475504-1.0.1.1-QWoemjUZW.hzUnHuHLbn0O8zPAtiGemjjSHKSBcdt18; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "20000",
+      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=996",
+      "anthropic-ratelimit-input-tokens-remaining" : "4000000",
+      "anthropic-ratelimit-requests-remaining" : "19999",
+      "Content-Type" : "application/json",
+      "CF-RAY" : "9e9437b3ec2d18f4-SEA",
+      "anthropic-ratelimit-tokens-limit" : "4800000",
+      "cf-cache-status" : "DYNAMIC",
+      "request-id" : "req_011CZryr7RL31CABbWKC7Vho",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:03:15Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:03:15 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:03:14Z",
+      "anthropic-ratelimit-input-tokens-limit" : "4000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "800000"
+    }
+  },
+  "uuid" : "161ff70a-c4a2-4379-bc69-8f73b0fa6ac7",
+  "persistent" : true,
+  "insertionIndex" : 1
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-1f4e5f7d-1ba9-41aa-b26a-ede57e72baa0.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-1f4e5f7d-1ba9-41aa-b26a-ede57e72baa0.json
new file mode 100644
index 00000000..1de7034c
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-1f4e5f7d-1ba9-41aa-b26a-ede57e72baa0.json
@@ -0,0 +1,53 @@
+{
+  "id" : "1f4e5f7d-1ba9-41aa-b26a-ede57e72baa0",
+  "name" : "v1_messages",
+  "request" : {
+    "url" : "/v1/messages",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"max_tokens\":128,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-haiku-4-5-20251001\",\"system\":\"You are a helpful assistant.\",\"temperature\":0.0}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_messages-1f4e5f7d-1ba9-41aa-b26a-ede57e72baa0.json",
+    "headers" : {
+      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "458",
+      "Server" : "cloudflare",
+      "vary" : "Accept-Encoding",
+      "anthropic-ratelimit-output-tokens-limit" : "800000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:03:14Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:03:14Z",
+      "anthropic-ratelimit-tokens-remaining" : "4800000",
+      "set-cookie" : "_cfuvid=3OZ5gNMUn0VD9nBgC0mvkRN94oJFI96mrKFZOAyMekQ-1775682193.6756592-1.0.1.1-_ZOmpE8WyusuOOZCXmqPxQLXgkHxO7VvGbPwjZvdp3Y; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "20000",
+      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=462",
+      "anthropic-ratelimit-input-tokens-remaining" : "4000000",
+      "anthropic-ratelimit-requests-remaining" : "19999",
+      "Content-Type" : "application/json",
+      "CF-RAY" : "9e9437ae7bb0c643-SEA",
+      "anthropic-ratelimit-tokens-limit" : "4800000",
+      "cf-cache-status" : "DYNAMIC",
+      "request-id" : "req_011CZryr3h6riqpxcu941bEG",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:03:14Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:03:14 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:03:13Z",
+      "anthropic-ratelimit-input-tokens-limit" : "4000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "800000"
+    }
+  },
+  "uuid" : "1f4e5f7d-1ba9-41aa-b26a-ede57e72baa0",
+  "persistent" : true,
+  "insertionIndex" : 3
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-22f11bf1-a6fb-4733-86b9-42bd18ee37ee.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-22f11bf1-a6fb-4733-86b9-42bd18ee37ee.json
deleted file mode 100644
index e098001a..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-22f11bf1-a6fb-4733-86b9-42bd18ee37ee.json
+++ /dev/null
@@ -1,51 +0,0 @@
-{
-  "id" : "22f11bf1-a6fb-4733-86b9-42bd18ee37ee",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages?beta=true",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-22f11bf1-a6fb-4733-86b9-42bd18ee37ee.json",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 00:34:36 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T00:34:36Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T00:34:36Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T00:34:36Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T00:34:36Z",
-      "request-id" : "req_011CYizessocNRqkQjjCFttf",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "308",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d75092feb4c8b7a-SEA"
-    }
-  },
-  "uuid" : "22f11bf1-a6fb-4733-86b9-42bd18ee37ee",
-  "persistent" : true,
-  "insertionIndex" : 6
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-6ba9356c-fcde-4279-95e0-9dc0c0d27dc7.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-2d588166-5193-482c-adb8-f0f5b04240c1.json
similarity index 62%
rename from test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-6ba9356c-fcde-4279-95e0-9dc0c0d27dc7.json
rename to test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-2d588166-5193-482c-adb8-f0f5b04240c1.json
index eeba00c5..15a74a6c 100644
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-6ba9356c-fcde-4279-95e0-9dc0c0d27dc7.json
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-2d588166-5193-482c-adb8-f0f5b04240c1.json
@@ -1,5 +1,5 @@
 {
-  "id" : "6ba9356c-fcde-4279-95e0-9dc0c0d27dc7",
+  "id" : "2d588166-5193-482c-adb8-f0f5b04240c1",
   "name" : "v1_messages",
   "request" : {
     "url" : "/v1/messages",
@@ -17,39 +17,41 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_messages-6ba9356c-fcde-4279-95e0-9dc0c0d27dc7.txt",
+    "bodyFileName" : "v1_messages-2d588166-5193-482c-adb8-f0f5b04240c1.txt",
     "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:41:16 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:41:16Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:41:16Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:41:16Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:41:16Z",
-      "request-id" : "req_011CYkRX3CamVWQsxTF4L5Vs",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
       "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "356",
       "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "223",
       "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-output-tokens-limit" : "1500000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:05:51Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:05:51Z",
+      "anthropic-ratelimit-tokens-remaining" : "9500000",
+      "set-cookie" : "_cfuvid=mnB9GLxiyQWs3eggMZcQ7sju1ab9kOxAhmvc.ZFuI6o-1775682351.8267207-1.0.1.1-YgkwmQwY2fZKZrzIlXzTCxZrHOrGBo2tbC873n15TNw; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "10000",
       "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=360",
+      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
+      "anthropic-ratelimit-requests-remaining" : "9999",
+      "Content-Type" : "text/event-stream; charset=utf-8",
+      "CF-RAY" : "9e943b8aeb69769a-SEA",
+      "anthropic-ratelimit-tokens-limit" : "9500000",
       "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b40fadaa9dcfb-SEA"
+      "request-id" : "req_011CZrz3hv3zqwQd7R7VMSGm",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:05:51Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:05:52 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:05:51Z",
+      "Cache-Control" : "no-cache",
+      "anthropic-ratelimit-input-tokens-limit" : "8000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "1500000"
     }
   },
-  "uuid" : "6ba9356c-fcde-4279-95e0-9dc0c0d27dc7",
+  "uuid" : "2d588166-5193-482c-adb8-f0f5b04240c1",
   "persistent" : true,
   "scenarioName" : "scenario-1-v1-messages",
   "requiredScenarioState" : "Started",
   "newScenarioState" : "scenario-1-v1-messages-2",
-  "insertionIndex" : 21
+  "insertionIndex" : 10
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-3a44dc7b-7c58-42c6-a05b-9701cde28008.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-3a44dc7b-7c58-42c6-a05b-9701cde28008.json
deleted file mode 100644
index 8eb43178..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-3a44dc7b-7c58-42c6-a05b-9701cde28008.json
+++ /dev/null
@@ -1,51 +0,0 @@
-{
-  "id" : "3a44dc7b-7c58-42c6-a05b-9701cde28008",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages?beta=true",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-3a44dc7b-7c58-42c6-a05b-9701cde28008.json",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:14:43 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:14:43Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:14:43Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:14:43Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:14:43Z",
-      "request-id" : "req_011CYkPVdJPoS7pppWeQi75g",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "300",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b1a17dc9d75da-SEA"
-    }
-  },
-  "uuid" : "3a44dc7b-7c58-42c6-a05b-9701cde28008",
-  "persistent" : true,
-  "insertionIndex" : 10
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-3e84b268-5860-4614-9b16-27bc47be967c.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-3e84b268-5860-4614-9b16-27bc47be967c.json
deleted file mode 100644
index 2439bc48..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-3e84b268-5860-4614-9b16-27bc47be967c.json
+++ /dev/null
@@ -1,52 +0,0 @@
-{
-  "id" : "3e84b268-5860-4614-9b16-27bc47be967c",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0,\"stream\":true}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-3e84b268-5860-4614-9b16-27bc47be967c.txt",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:14:47 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:14:47Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:14:47Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:14:47Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:14:47Z",
-      "request-id" : "req_011CYkPVv8v87RFn8Zh5epja",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "240",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b1a306dcc281c-SEA"
-    }
-  },
-  "uuid" : "3e84b268-5860-4614-9b16-27bc47be967c",
-  "persistent" : true,
-  "insertionIndex" : 13
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-409d6eae-0222-40f5-8c25-f85fed3083e7.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-409d6eae-0222-40f5-8c25-f85fed3083e7.json
deleted file mode 100644
index cb91b17f..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-409d6eae-0222-40f5-8c25-f85fed3083e7.json
+++ /dev/null
@@ -1,52 +0,0 @@
-{
-  "id" : "409d6eae-0222-40f5-8c25-f85fed3083e7",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages?beta=true",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0,\"stream\":true}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-409d6eae-0222-40f5-8c25-f85fed3083e7.txt",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:37:44 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:37:44Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:37:44Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:37:44Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:37:44Z",
-      "request-id" : "req_011CYkRFTW8547GKCu3Cp4nj",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "204",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b3bd1cc087563-SEA"
-    }
-  },
-  "uuid" : "409d6eae-0222-40f5-8c25-f85fed3083e7",
-  "persistent" : true,
-  "insertionIndex" : 14
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-44f66b34-c858-4ac0-8a76-a15873892386.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-44f66b34-c858-4ac0-8a76-a15873892386.json
deleted file mode 100644
index 0c018675..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-44f66b34-c858-4ac0-8a76-a15873892386.json
+++ /dev/null
@@ -1,54 +0,0 @@
-{
-  "id" : "44f66b34-c858-4ac0-8a76-a15873892386",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-44f66b34-c858-4ac0-8a76-a15873892386.json",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:37:47 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:37:47Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:37:47Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:37:47Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:37:47Z",
-      "request-id" : "req_011CYkRFeZdqVfexpAKAuEUZ",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "343",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b3be1e8b6c378-SEA"
-    }
-  },
-  "uuid" : "44f66b34-c858-4ac0-8a76-a15873892386",
-  "persistent" : true,
-  "scenarioName" : "scenario-1-v1-messages",
-  "requiredScenarioState" : "Started",
-  "newScenarioState" : "scenario-1-v1-messages-2",
-  "insertionIndex" : 16
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-47082d84-2083-4057-891f-48f77e246b16.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-47082d84-2083-4057-891f-48f77e246b16.json
new file mode 100644
index 00000000..467f3a1d
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-47082d84-2083-4057-891f-48f77e246b16.json
@@ -0,0 +1,54 @@
+{
+  "id" : "47082d84-2083-4057-891f-48f77e246b16",
+  "name" : "v1_messages",
+  "request" : {
+    "url" : "/v1/messages",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"max_tokens\":128,\"messages\":[{\"content\":\"Count from 1 to 5.\",\"role\":\"user\"}],\"model\":\"claude-haiku-4-5-20251001\",\"system\":\"You are a helpful assistant.\",\"temperature\":0.0,\"stream\":true}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_messages-47082d84-2083-4057-891f-48f77e246b16.txt",
+    "headers" : {
+      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "462",
+      "Server" : "cloudflare",
+      "vary" : "Accept-Encoding",
+      "anthropic-ratelimit-output-tokens-limit" : "800000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:03:12Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:03:12Z",
+      "anthropic-ratelimit-tokens-remaining" : "4791000",
+      "set-cookie" : "_cfuvid=qzpl4wE8yd75Igv4voFXZutYdnMVKxl1QVaPi7i46CM-1775682191.9616196-1.0.1.1-r8JJLAYtw4RhPExwCWzLcomtRUnXHVOzgs6JaXgrjyQ; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "20000",
+      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=464",
+      "anthropic-ratelimit-input-tokens-remaining" : "3991000",
+      "anthropic-ratelimit-requests-remaining" : "19999",
+      "Content-Type" : "text/event-stream; charset=utf-8",
+      "CF-RAY" : "9e9437a3bd047533-SEA",
+      "anthropic-ratelimit-tokens-limit" : "4800000",
+      "cf-cache-status" : "DYNAMIC",
+      "request-id" : "req_011CZryqvRnYDouF7V8t3u94",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:03:12Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:03:12 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:03:12Z",
+      "Cache-Control" : "no-cache",
+      "anthropic-ratelimit-input-tokens-limit" : "4000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "800000"
+    }
+  },
+  "uuid" : "47082d84-2083-4057-891f-48f77e246b16",
+  "persistent" : true,
+  "insertionIndex" : 5
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-491eefc7-3731-4f09-8d82-ae822cb5f000.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-491eefc7-3731-4f09-8d82-ae822cb5f000.json
deleted file mode 100644
index eadacbb0..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-491eefc7-3731-4f09-8d82-ae822cb5f000.json
+++ /dev/null
@@ -1,51 +0,0 @@
-{
-  "id" : "491eefc7-3731-4f09-8d82-ae822cb5f000",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-5-haiku-20241022\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0,\"stream\":true}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-491eefc7-3731-4f09-8d82-ae822cb5f000.txt",
-    "headers" : {
-      "Date" : "Wed, 18 Feb 2026 05:10:50 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-02-18T05:10:50Z",
-      "anthropic-ratelimit-input-tokens-limit" : "5000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "5000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-02-18T05:10:50Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1000000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1000000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-02-18T05:10:50Z",
-      "anthropic-ratelimit-tokens-limit" : "6000000",
-      "anthropic-ratelimit-tokens-remaining" : "6000000",
-      "anthropic-ratelimit-tokens-reset" : "2026-02-18T05:10:50Z",
-      "request-id" : "req_011CYExastbwMUQAdyueUmp9",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "361",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9cfb0532e855ea78-SEA"
-    }
-  },
-  "uuid" : "491eefc7-3731-4f09-8d82-ae822cb5f000",
-  "persistent" : true,
-  "insertionIndex" : 2
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-87b2b5f3-b093-475f-bbde-1ab031e72500.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-4a7e3600-3b68-4c2e-b906-e51f3637d5f5.json
similarity index 56%
rename from test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-87b2b5f3-b093-475f-bbde-1ab031e72500.json
rename to test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-4a7e3600-3b68-4c2e-b906-e51f3637d5f5.json
index dc5a7ee5..9d5e0b0e 100644
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-87b2b5f3-b093-475f-bbde-1ab031e72500.json
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-4a7e3600-3b68-4c2e-b906-e51f3637d5f5.json
@@ -1,14 +1,21 @@
 {
-  "id" : "87b2b5f3-b093-475f-bbde-1ab031e72500",
+  "id" : "4a7e3600-3b68-4c2e-b906-e51f3637d5f5",
   "name" : "v1_messages",
   "request" : {
-    "url" : "/v1/messages",
+    "urlPath" : "/v1/messages",
     "method" : "POST",
     "headers" : {
       "Content-Type" : {
         "equalTo" : "application/json"
       }
     },
+    "queryParameters" : {
+      "beta" : {
+        "hasExactly" : [ {
+          "equalTo" : "true"
+        } ]
+      }
+    },
     "bodyPatterns" : [ {
       "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0,\"stream\":true}",
       "ignoreArrayOrder" : true,
@@ -17,36 +24,38 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_messages-87b2b5f3-b093-475f-bbde-1ab031e72500.txt",
+    "bodyFileName" : "v1_messages-4a7e3600-3b68-4c2e-b906-e51f3637d5f5.txt",
     "headers" : {
-      "Date" : "Thu, 05 Mar 2026 00:34:38 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T00:34:38Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T00:34:38Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T00:34:38Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T00:34:38Z",
-      "request-id" : "req_011CYizf3uoQ9dyNV1imPJH8",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
       "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "301",
       "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "268",
       "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-output-tokens-limit" : "1500000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:05:48Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:05:48Z",
+      "anthropic-ratelimit-tokens-remaining" : "9500000",
+      "set-cookie" : "_cfuvid=fUyQGRCk8JThjnWHD1EuN4UsSH.vjdJ7A2jqCfexuDA-1775682348.6898837-1.0.1.1-StHYD5p_Qw0bxJwONTZkjIJiEjUSCZxL_cC5_h5gHwA; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "10000",
       "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=303",
+      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
+      "anthropic-ratelimit-requests-remaining" : "9999",
+      "Content-Type" : "text/event-stream; charset=utf-8",
+      "CF-RAY" : "9e943b774c44b5ed-SEA",
+      "anthropic-ratelimit-tokens-limit" : "9500000",
       "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d75093e8adf2403-SEA"
+      "request-id" : "req_011CZrz3URwNaiUaiBWtALvT",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:05:48Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:05:49 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:05:48Z",
+      "Cache-Control" : "no-cache",
+      "anthropic-ratelimit-input-tokens-limit" : "8000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "1500000"
     }
   },
-  "uuid" : "87b2b5f3-b093-475f-bbde-1ab031e72500",
+  "uuid" : "4a7e3600-3b68-4c2e-b906-e51f3637d5f5",
   "persistent" : true,
-  "insertionIndex" : 8
+  "insertionIndex" : 12
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-4f0b5ed5-27e9-4320-be33-b0bd8da32323.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-4f0b5ed5-27e9-4320-be33-b0bd8da32323.json
deleted file mode 100644
index aa952fa7..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-4f0b5ed5-27e9-4320-be33-b0bd8da32323.json
+++ /dev/null
@@ -1,52 +0,0 @@
-{
-  "id" : "4f0b5ed5-27e9-4320-be33-b0bd8da32323",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages?beta=true",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0,\"stream\":true}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-4f0b5ed5-27e9-4320-be33-b0bd8da32323.txt",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:41:13 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:41:13Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:41:13Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:41:13Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:41:13Z",
-      "request-id" : "req_011CYkRWrSvi4BKWsvW56iR4",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "188",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b40eb0fe649b2-SEA"
-    }
-  },
-  "uuid" : "4f0b5ed5-27e9-4320-be33-b0bd8da32323",
-  "persistent" : true,
-  "insertionIndex" : 19
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-573656d9-4187-49ad-80f1-ab5282de3f99.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-573656d9-4187-49ad-80f1-ab5282de3f99.json
deleted file mode 100644
index 4c00cb67..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-573656d9-4187-49ad-80f1-ab5282de3f99.json
+++ /dev/null
@@ -1,50 +0,0 @@
-{
-  "id" : "573656d9-4187-49ad-80f1-ab5282de3f99",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-5-haiku-20241022\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-573656d9-4187-49ad-80f1-ab5282de3f99.json",
-    "headers" : {
-      "Date" : "Wed, 18 Feb 2026 05:10:49 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-02-18T05:10:48Z",
-      "anthropic-ratelimit-input-tokens-limit" : "5000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "5000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-02-18T05:10:48Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1000000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1000000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-02-18T05:10:49Z",
-      "anthropic-ratelimit-tokens-limit" : "6000000",
-      "anthropic-ratelimit-tokens-remaining" : "6000000",
-      "anthropic-ratelimit-tokens-reset" : "2026-02-18T05:10:48Z",
-      "request-id" : "req_011CYExame4aVudBrCvBTo55",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "436",
-      "cf-cache-status" : "DYNAMIC",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "CF-RAY" : "9cfb0529de1e5580-SEA"
-    }
-  },
-  "uuid" : "573656d9-4187-49ad-80f1-ab5282de3f99",
-  "persistent" : true,
-  "insertionIndex" : 1
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-fb58e44c-ab06-4f85-a6fd-e0e982440750.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-5b575537-813b-4fd0-ac6f-27285f2caa6d.json
similarity index 63%
rename from test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-fb58e44c-ab06-4f85-a6fd-e0e982440750.json
rename to test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-5b575537-813b-4fd0-ac6f-27285f2caa6d.json
index 75f15af1..bb124947 100644
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-fb58e44c-ab06-4f85-a6fd-e0e982440750.json
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-5b575537-813b-4fd0-ac6f-27285f2caa6d.json
@@ -1,5 +1,5 @@
 {
-  "id" : "fb58e44c-ab06-4f85-a6fd-e0e982440750",
+  "id" : "5b575537-813b-4fd0-ac6f-27285f2caa6d",
   "name" : "v1_messages",
   "request" : {
     "url" : "/v1/messages",
@@ -17,38 +17,38 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_messages-fb58e44c-ab06-4f85-a6fd-e0e982440750.txt",
+    "bodyFileName" : "v1_messages-5b575537-813b-4fd0-ac6f-27285f2caa6d.txt",
     "headers" : {
       "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "x-envoy-upstream-service-time" : "365",
+      "x-envoy-upstream-service-time" : "588",
       "Server" : "cloudflare",
       "vary" : "Accept-Encoding",
       "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-24T05:21:48Z",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-24T05:21:48Z",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:06:44Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:06:44Z",
       "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "set-cookie" : "_cfuvid=thVxqAn1MAu.ZVF1i3CFr5kHWdGFtaXSox4YChe7eL8-1774329708.2827516-1.0.1.1-C7bikHGed59W3Mc2pozL47k3kYDz6DlwP8NqKf6dvrc; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "set-cookie" : "_cfuvid=LFDhyRUScyzTVws7EQ6WgqHB0KxdXJQ6ONSlURKkE_U-1775682404.6563592-1.0.1.1-szBGig_ik.zwFAjMhsD6a3_sxSjXeIKTPEbnIAtpnEs; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
       "anthropic-ratelimit-requests-limit" : "10000",
       "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "server-timing" : "x-originResponse;dur=367",
+      "server-timing" : "x-originResponse;dur=595",
       "anthropic-ratelimit-input-tokens-remaining" : "8000000",
       "anthropic-ratelimit-requests-remaining" : "9999",
       "Content-Type" : "text/event-stream; charset=utf-8",
-      "CF-RAY" : "9e133c04c94175a6-SEA",
+      "CF-RAY" : "9e943cd51f0b7610-SEA",
       "anthropic-ratelimit-tokens-limit" : "9500000",
       "cf-cache-status" : "DYNAMIC",
-      "request-id" : "req_011CZMLvXnjTBmaqAbhtMejy",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-24T05:21:48Z",
+      "request-id" : "req_011CZrz7bkLGRmPzSiNaBjLV",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:06:44Z",
       "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "Date" : "Tue, 24 Mar 2026 05:21:48 GMT",
+      "Date" : "Wed, 08 Apr 2026 21:06:45 GMT",
       "X-Robots-Tag" : "none",
-      "anthropic-ratelimit-requests-reset" : "2026-03-24T05:21:48Z",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:06:44Z",
       "Cache-Control" : "no-cache",
       "anthropic-ratelimit-input-tokens-limit" : "8000000",
       "anthropic-ratelimit-output-tokens-remaining" : "1500000"
     }
   },
-  "uuid" : "fb58e44c-ab06-4f85-a6fd-e0e982440750",
+  "uuid" : "5b575537-813b-4fd0-ac6f-27285f2caa6d",
   "persistent" : true,
-  "insertionIndex" : 25
+  "insertionIndex" : 13
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-17680b84-4d29-4d65-8473-9e046e3720d7.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-672a77ea-d101-4894-99d2-91ee1d4579e4.json
similarity index 60%
rename from test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-17680b84-4d29-4d65-8473-9e046e3720d7.json
rename to test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-672a77ea-d101-4894-99d2-91ee1d4579e4.json
index 600a2ad7..7bfb914d 100644
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-17680b84-4d29-4d65-8473-9e046e3720d7.json
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-672a77ea-d101-4894-99d2-91ee1d4579e4.json
@@ -1,5 +1,5 @@
 {
-  "id" : "17680b84-4d29-4d65-8473-9e046e3720d7",
+  "id" : "672a77ea-d101-4894-99d2-91ee1d4579e4",
   "name" : "v1_messages",
   "request" : {
     "url" : "/v1/messages",
@@ -17,37 +17,38 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_messages-17680b84-4d29-4d65-8473-9e046e3720d7.json",
+    "bodyFileName" : "v1_messages-672a77ea-d101-4894-99d2-91ee1d4579e4.json",
     "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:41:18 GMT",
-      "Content-Type" : "application/json",
+      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "432",
+      "Server" : "cloudflare",
+      "anthropic-ratelimit-output-tokens-limit" : "1500000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:05:55Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:05:55Z",
+      "anthropic-ratelimit-tokens-remaining" : "9500000",
+      "set-cookie" : "_cfuvid=0_Iphg6rX46X2QjmZ4BwCE6Sim9xUjOmZHoQtn0vxvI-1775682354.9141574-1.0.1.1-cN4OeBO8AGYS577seWFhwVgFywsiM3BNICJJz86zoM0; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
       "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:41:18Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
+      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=434",
       "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:41:18Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:41:18Z",
+      "anthropic-ratelimit-requests-remaining" : "9999",
+      "Content-Type" : "application/json",
+      "CF-RAY" : "9e943b9e39637672-SEA",
       "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:41:18Z",
-      "request-id" : "req_011CYkRXDUxhSaB2gwBvUpQN",
+      "cf-cache-status" : "DYNAMIC",
+      "request-id" : "req_011CZrz3w6ZPw4YPhGKgGei1",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:05:55Z",
       "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "321",
-      "vary" : "Accept-Encoding",
+      "Date" : "Wed, 08 Apr 2026 21:05:55 GMT",
       "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b4109db3d7628-SEA"
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:05:55Z",
+      "anthropic-ratelimit-input-tokens-limit" : "8000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "1500000"
     }
   },
-  "uuid" : "17680b84-4d29-4d65-8473-9e046e3720d7",
+  "uuid" : "672a77ea-d101-4894-99d2-91ee1d4579e4",
   "persistent" : true,
   "scenarioName" : "scenario-2-v1-messages",
   "requiredScenarioState" : "scenario-2-v1-messages-2",
-  "insertionIndex" : 23
+  "insertionIndex" : 8
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-163b371b-f5f0-4e1d-8564-aeb1a452329e.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-6e3b67ab-fb16-4353-aa3b-da0b5a10658a.json
similarity index 56%
rename from test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-163b371b-f5f0-4e1d-8564-aeb1a452329e.json
rename to test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-6e3b67ab-fb16-4353-aa3b-da0b5a10658a.json
index 77a7a9cc..01351e01 100644
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-163b371b-f5f0-4e1d-8564-aeb1a452329e.json
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-6e3b67ab-fb16-4353-aa3b-da0b5a10658a.json
@@ -1,14 +1,21 @@
 {
-  "id" : "163b371b-f5f0-4e1d-8564-aeb1a452329e",
+  "id" : "6e3b67ab-fb16-4353-aa3b-da0b5a10658a",
   "name" : "v1_messages",
   "request" : {
-    "url" : "/v1/messages",
+    "urlPath" : "/v1/messages",
     "method" : "POST",
     "headers" : {
       "Content-Type" : {
         "equalTo" : "application/json"
       }
     },
+    "queryParameters" : {
+      "beta" : {
+        "hasExactly" : [ {
+          "equalTo" : "true"
+        } ]
+      }
+    },
     "bodyPatterns" : [ {
       "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
       "ignoreArrayOrder" : true,
@@ -17,37 +24,37 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_messages-163b371b-f5f0-4e1d-8564-aeb1a452329e.json",
+    "bodyFileName" : "v1_messages-6e3b67ab-fb16-4353-aa3b-da0b5a10658a.json",
     "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:14:46 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:14:45Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:14:45Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:14:46Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:14:45Z",
-      "request-id" : "req_011CYkPVpRcyNDMcr6QXzPMp",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
       "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
       "x-envoy-upstream-service-time" : "304",
+      "Server" : "cloudflare",
       "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-output-tokens-limit" : "1500000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:05:50Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:05:50Z",
+      "anthropic-ratelimit-tokens-remaining" : "9500000",
+      "set-cookie" : "_cfuvid=gyV.EjzULZCy178exUWyOa3Dn7xUfhReNdWF0XxLYFk-1775682350.5198364-1.0.1.1-Y_2OdnCJiK45J_sd1g_QvyTVuBBQrFUlhohn6fc06Q8; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "10000",
       "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=306",
+      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
+      "anthropic-ratelimit-requests-remaining" : "9999",
+      "Content-Type" : "application/json",
+      "CF-RAY" : "9e943b82bc19985d-SEA",
+      "anthropic-ratelimit-tokens-limit" : "9500000",
       "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b1a282a80e945-SEA"
+      "request-id" : "req_011CZrz3cGUML7Jqz8eE6fbx",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:05:50Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:05:50 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:05:50Z",
+      "anthropic-ratelimit-input-tokens-limit" : "8000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "1500000"
     }
   },
-  "uuid" : "163b371b-f5f0-4e1d-8564-aeb1a452329e",
+  "uuid" : "6e3b67ab-fb16-4353-aa3b-da0b5a10658a",
   "persistent" : true,
-  "scenarioName" : "scenario-1-v1-messages",
-  "requiredScenarioState" : "scenario-1-v1-messages-2",
-  "insertionIndex" : 12
+  "insertionIndex" : 11
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-7078924e-9396-4b07-885c-23d7d0c80090.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-7078924e-9396-4b07-885c-23d7d0c80090.json
deleted file mode 100644
index 364502cc..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-7078924e-9396-4b07-885c-23d7d0c80090.json
+++ /dev/null
@@ -1,54 +0,0 @@
-{
-  "id" : "7078924e-9396-4b07-885c-23d7d0c80090",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-7078924e-9396-4b07-885c-23d7d0c80090.json",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:14:44 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:14:44Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:14:44Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:14:44Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:14:44Z",
-      "request-id" : "req_011CYkPVjFKvz22EgGzbr6Tx",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "282",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b1a209d72be02-SEA"
-    }
-  },
-  "uuid" : "7078924e-9396-4b07-885c-23d7d0c80090",
-  "persistent" : true,
-  "scenarioName" : "scenario-1-v1-messages",
-  "requiredScenarioState" : "Started",
-  "newScenarioState" : "scenario-1-v1-messages-2",
-  "insertionIndex" : 11
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-759ba9d9-fbff-4177-8666-aac06350c678.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-759ba9d9-fbff-4177-8666-aac06350c678.json
deleted file mode 100644
index 04ff6f07..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-759ba9d9-fbff-4177-8666-aac06350c678.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "759ba9d9-fbff-4177-8666-aac06350c678",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages?beta=true",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-759ba9d9-fbff-4177-8666-aac06350c678.json",
-    "headers" : {
-      "Date" : "Mon, 02 Mar 2026 19:22:18 GMT",
-      "Content-Type" : "application/json",
-      "request-id" : "req_011CYeoDkHufAufPH1tAXAkB",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "1332",
-      "vary" : "Accept-Encoding",
-      "cf-cache-status" : "DYNAMIC",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "CF-RAY" : "9d62c4f3fa6250a1-SJC"
-    }
-  },
-  "uuid" : "759ba9d9-fbff-4177-8666-aac06350c678",
-  "persistent" : true,
-  "insertionIndex" : 4
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-7b66b6a7-2d16-4e55-b2c0-47f225d0d8a1.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-7b66b6a7-2d16-4e55-b2c0-47f225d0d8a1.json
new file mode 100644
index 00000000..1d575e00
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-7b66b6a7-2d16-4e55-b2c0-47f225d0d8a1.json
@@ -0,0 +1,53 @@
+{
+  "id" : "7b66b6a7-2d16-4e55-b2c0-47f225d0d8a1",
+  "name" : "v1_messages",
+  "request" : {
+    "url" : "/v1/messages",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"model\":\"claude-haiku-4-5-20251001\",\"messages\":[{\"content\":[{\"type\":\"text\",\"text\":\"What color is this image?\"},{\"type\":\"image\",\"source\":{\"type\":\"base64\",\"media_type\":\"image/png\",\"data\":\"iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8DwHwAFBQIAX8jx0gAAAABJRU5ErkJggg==\"}}],\"role\":\"user\"}],\"max_tokens\":128,\"stream\":false,\"temperature\":0.0}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_messages-7b66b6a7-2d16-4e55-b2c0-47f225d0d8a1.json",
+    "headers" : {
+      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "907",
+      "Server" : "cloudflare",
+      "vary" : "Accept-Encoding",
+      "anthropic-ratelimit-output-tokens-limit" : "800000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:03:15Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:03:14Z",
+      "anthropic-ratelimit-tokens-remaining" : "4783000",
+      "set-cookie" : "_cfuvid=k1Ggj6ySuPaq6KJ6QHvu9JuKa1NiXO38yc64eAbiiCk-1775682194.1009822-1.0.1.1-6f8L2huC7bcYVcVxIZdldJefu0wYqhLaEJI7UWfD4tI; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "20000",
+      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=910",
+      "anthropic-ratelimit-input-tokens-remaining" : "3983000",
+      "anthropic-ratelimit-requests-remaining" : "19999",
+      "Content-Type" : "application/json",
+      "CF-RAY" : "9e9437b11f2c50b7-SEA",
+      "anthropic-ratelimit-tokens-limit" : "4800000",
+      "cf-cache-status" : "DYNAMIC",
+      "request-id" : "req_011CZryr5aD4Lo6784wKDHDt",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:03:14Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:03:15 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:03:14Z",
+      "anthropic-ratelimit-input-tokens-limit" : "4000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "800000"
+    }
+  },
+  "uuid" : "7b66b6a7-2d16-4e55-b2c0-47f225d0d8a1",
+  "persistent" : true,
+  "insertionIndex" : 2
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-7b8cac9c-793a-4dc7-8d7d-71d773210345.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-7b8cac9c-793a-4dc7-8d7d-71d773210345.json
deleted file mode 100644
index ce0d62d3..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-7b8cac9c-793a-4dc7-8d7d-71d773210345.json
+++ /dev/null
@@ -1,53 +0,0 @@
-{
-  "id" : "7b8cac9c-793a-4dc7-8d7d-71d773210345",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-7b8cac9c-793a-4dc7-8d7d-71d773210345.json",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:37:48 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:37:48Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:37:48Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:37:48Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:37:48Z",
-      "request-id" : "req_011CYkRFk9FFhofJ15AFaFhn",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "302",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b3bea1dc7af88-SEA"
-    }
-  },
-  "uuid" : "7b8cac9c-793a-4dc7-8d7d-71d773210345",
-  "persistent" : true,
-  "scenarioName" : "scenario-1-v1-messages",
-  "requiredScenarioState" : "scenario-1-v1-messages-2",
-  "insertionIndex" : 17
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-80eb9d92-57cb-4538-ae33-4971b4f0717b.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-80eb9d92-57cb-4538-ae33-4971b4f0717b.json
new file mode 100644
index 00000000..672f86fb
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-80eb9d92-57cb-4538-ae33-4971b4f0717b.json
@@ -0,0 +1,54 @@
+{
+  "id" : "80eb9d92-57cb-4538-ae33-4971b4f0717b",
+  "name" : "v1_messages",
+  "request" : {
+    "url" : "/v1/messages",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"model\":\"claude-haiku-4-5-20251001\",\"messages\":[{\"content\":[{\"type\":\"text\",\"text\":\"Count from 1 to 5.\"}],\"role\":\"user\"}],\"system\":\"You are a helpful assistant.\",\"max_tokens\":128,\"stream\":true,\"temperature\":0.0}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_messages-80eb9d92-57cb-4538-ae33-4971b4f0717b.txt",
+    "headers" : {
+      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "402",
+      "Server" : "cloudflare",
+      "vary" : "Accept-Encoding",
+      "anthropic-ratelimit-output-tokens-limit" : "800000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:03:11Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:03:11Z",
+      "anthropic-ratelimit-tokens-remaining" : "4786000",
+      "set-cookie" : "_cfuvid=7ys20ZJhuUOzQhuy1CilUcyg3AJgkjCLb7PhDPJ.Wok-1775682191.0717738-1.0.1.1-_ww6b2SSm7Q6WRQS4JAoSvjR_yXk70Wl1cjeN.HcS7o; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "20000",
+      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=407",
+      "anthropic-ratelimit-input-tokens-remaining" : "3986000",
+      "anthropic-ratelimit-requests-remaining" : "19999",
+      "Content-Type" : "text/event-stream; charset=utf-8",
+      "CF-RAY" : "9e94379e3fb87536-SEA",
+      "anthropic-ratelimit-tokens-limit" : "4800000",
+      "cf-cache-status" : "DYNAMIC",
+      "request-id" : "req_011CZryqracJpVJKcJenNjCM",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:03:11Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:03:11 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:03:11Z",
+      "Cache-Control" : "no-cache",
+      "anthropic-ratelimit-input-tokens-limit" : "4000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "800000"
+    }
+  },
+  "uuid" : "80eb9d92-57cb-4538-ae33-4971b4f0717b",
+  "persistent" : true,
+  "insertionIndex" : 6
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-863c176a-4dbe-4c8f-a5a4-b4240172c3e6.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-863c176a-4dbe-4c8f-a5a4-b4240172c3e6.json
new file mode 100644
index 00000000..83dd752e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-863c176a-4dbe-4c8f-a5a4-b4240172c3e6.json
@@ -0,0 +1,53 @@
+{
+  "id" : "863c176a-4dbe-4c8f-a5a4-b4240172c3e6",
+  "name" : "v1_messages",
+  "request" : {
+    "url" : "/v1/messages",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"model\":\"claude-haiku-4-5-20251001\",\"messages\":[{\"content\":[{\"type\":\"text\",\"text\":\"What is the capital of France?\"}],\"role\":\"user\"}],\"system\":\"You are a helpful assistant.\",\"max_tokens\":128,\"stream\":false,\"temperature\":0.0}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_messages-863c176a-4dbe-4c8f-a5a4-b4240172c3e6.json",
+    "headers" : {
+      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "392",
+      "Server" : "cloudflare",
+      "vary" : "Accept-Encoding",
+      "anthropic-ratelimit-output-tokens-limit" : "800000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:03:13Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:03:13Z",
+      "anthropic-ratelimit-tokens-remaining" : "4800000",
+      "set-cookie" : "_cfuvid=MOAsUtglKfwDJJ21GHnt3PXBjG9I5ugRGGiR0Mh.kn0-1775682192.9682064-1.0.1.1-913Wr4tCQik2PlGA_4TckGD9AqGzXKjO6ShPUjFWr.c; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "20000",
+      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=401",
+      "anthropic-ratelimit-input-tokens-remaining" : "4000000",
+      "anthropic-ratelimit-requests-remaining" : "19999",
+      "Content-Type" : "application/json",
+      "CF-RAY" : "9e9437aa0cf523ab-SEA",
+      "anthropic-ratelimit-tokens-limit" : "4800000",
+      "cf-cache-status" : "DYNAMIC",
+      "request-id" : "req_011CZryqzhGWGSpoE8WHAAkd",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:03:13Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:03:13 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:03:13Z",
+      "anthropic-ratelimit-input-tokens-limit" : "4000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "800000"
+    }
+  },
+  "uuid" : "863c176a-4dbe-4c8f-a5a4-b4240172c3e6",
+  "persistent" : true,
+  "insertionIndex" : 4
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-893a66cc-08d6-423f-bda1-720822c1f022.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-893a66cc-08d6-423f-bda1-720822c1f022.json
deleted file mode 100644
index 2d67b69e..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-893a66cc-08d6-423f-bda1-720822c1f022.json
+++ /dev/null
@@ -1,51 +0,0 @@
-{
-  "id" : "893a66cc-08d6-423f-bda1-720822c1f022",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages?beta=true",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-893a66cc-08d6-423f-bda1-720822c1f022.json",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:41:14 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:41:14Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:41:14Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:41:14Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:41:14Z",
-      "request-id" : "req_011CYkRWwKs5vVSGwGHwvjVY",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "304",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b40f24bb65b4d-SEA"
-    }
-  },
-  "uuid" : "893a66cc-08d6-423f-bda1-720822c1f022",
-  "persistent" : true,
-  "insertionIndex" : 20
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-91a6d654-41ea-41c3-8205-e1e5123246a8.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-91a6d654-41ea-41c3-8205-e1e5123246a8.json
deleted file mode 100644
index a994f514..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-91a6d654-41ea-41c3-8205-e1e5123246a8.json
+++ /dev/null
@@ -1,52 +0,0 @@
-{
-  "id" : "91a6d654-41ea-41c3-8205-e1e5123246a8",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages?beta=true",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0,\"stream\":true}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-91a6d654-41ea-41c3-8205-e1e5123246a8.txt",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:14:42 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:14:42Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:14:42Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:14:42Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:14:42Z",
-      "request-id" : "req_011CYkPVXvguL4JQEShs8vWq",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "337",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b1a0ffabe76c8-SEA"
-    }
-  },
-  "uuid" : "91a6d654-41ea-41c3-8205-e1e5123246a8",
-  "persistent" : true,
-  "insertionIndex" : 9
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-b437c5ce-d528-4f0d-80f2-01cd5d7ba72e.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-b437c5ce-d528-4f0d-80f2-01cd5d7ba72e.json
deleted file mode 100644
index 675e6f80..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-b437c5ce-d528-4f0d-80f2-01cd5d7ba72e.json
+++ /dev/null
@@ -1,52 +0,0 @@
-{
-  "id" : "b437c5ce-d528-4f0d-80f2-01cd5d7ba72e",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages?beta=true",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0,\"stream\":true}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-b437c5ce-d528-4f0d-80f2-01cd5d7ba72e.txt",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 00:34:35 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T00:34:35Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T00:34:34Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T00:34:34Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T00:34:34Z",
-      "request-id" : "req_011CYizenhG5WtUx8dBK5ZDx",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "241",
-      "vary" : "Accept-Encoding",
-      "cf-cache-status" : "DYNAMIC",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "CF-RAY" : "9d7509285854eb9f-SEA"
-    }
-  },
-  "uuid" : "b437c5ce-d528-4f0d-80f2-01cd5d7ba72e",
-  "persistent" : true,
-  "insertionIndex" : 5
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-87ebefc6-6fa9-4e6f-aa0b-665450656a60.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-b7750859-35f1-4f31-a04e-cd9743b96fbb.json
similarity index 62%
rename from test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-87ebefc6-6fa9-4e6f-aa0b-665450656a60.json
rename to test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-b7750859-35f1-4f31-a04e-cd9743b96fbb.json
index 16f03bb8..f2759a76 100644
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-87ebefc6-6fa9-4e6f-aa0b-665450656a60.json
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-b7750859-35f1-4f31-a04e-cd9743b96fbb.json
@@ -1,5 +1,5 @@
 {
-  "id" : "87ebefc6-6fa9-4e6f-aa0b-665450656a60",
+  "id" : "b7750859-35f1-4f31-a04e-cd9743b96fbb",
   "name" : "v1_messages",
   "request" : {
     "url" : "/v1/messages",
@@ -17,37 +17,37 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_messages-87ebefc6-6fa9-4e6f-aa0b-665450656a60.json",
+    "bodyFileName" : "v1_messages-b7750859-35f1-4f31-a04e-cd9743b96fbb.json",
     "headers" : {
       "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "x-envoy-upstream-service-time" : "364",
+      "x-envoy-upstream-service-time" : "386",
       "Server" : "cloudflare",
       "vary" : "Accept-Encoding",
       "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-24T05:21:41Z",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-24T05:21:41Z",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:06:39Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:06:39Z",
       "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "set-cookie" : "_cfuvid=TtFCiarcTSxH9g2lzU82cXqwoi0H0FqparanWW2fdM0-1774329701.218075-1.0.1.1-DeCwuCusqYdinXYb7ohQsXBNkZtvnl5J.ljwBAn3ztc; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "set-cookie" : "_cfuvid=oTO4IwwlvEECPIlIkFIwrvAkEFsBHkiB9lMgZkwlRf8-1775682398.7017434-1.0.1.1-Arzr0V1L0dIQ5.4SA3EEdaCCfTg2AfUKYhuH5_bvUVw; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
       "anthropic-ratelimit-requests-limit" : "10000",
       "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "server-timing" : "x-originResponse;dur=367",
+      "server-timing" : "x-originResponse;dur=389",
       "anthropic-ratelimit-input-tokens-remaining" : "8000000",
       "anthropic-ratelimit-requests-remaining" : "9999",
       "Content-Type" : "application/json",
-      "CF-RAY" : "9e133bd89bcf75a0-SEA",
+      "CF-RAY" : "9e943cafde6bba00-SEA",
       "anthropic-ratelimit-tokens-limit" : "9500000",
       "cf-cache-status" : "DYNAMIC",
-      "request-id" : "req_011CZMLv1Y4c3K7FLqnTPUXu",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-24T05:21:41Z",
+      "request-id" : "req_011CZrz7AH9YYzUcdm5fNe1d",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:06:39Z",
       "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "Date" : "Tue, 24 Mar 2026 05:21:41 GMT",
+      "Date" : "Wed, 08 Apr 2026 21:06:39 GMT",
       "X-Robots-Tag" : "none",
-      "anthropic-ratelimit-requests-reset" : "2026-03-24T05:21:41Z",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:06:38Z",
       "anthropic-ratelimit-input-tokens-limit" : "8000000",
       "anthropic-ratelimit-output-tokens-remaining" : "1500000"
     }
   },
-  "uuid" : "87ebefc6-6fa9-4e6f-aa0b-665450656a60",
+  "uuid" : "b7750859-35f1-4f31-a04e-cd9743b96fbb",
   "persistent" : true,
-  "insertionIndex" : 27
+  "insertionIndex" : 15
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-9232af2f-2a7b-4d67-af05-fcc609fd5466.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-bdea12a4-6f59-4111-b44d-4c457b7dcf45.json
similarity index 61%
rename from test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-9232af2f-2a7b-4d67-af05-fcc609fd5466.json
rename to test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-bdea12a4-6f59-4111-b44d-4c457b7dcf45.json
index 166250f9..bd8751b2 100644
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-9232af2f-2a7b-4d67-af05-fcc609fd5466.json
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-bdea12a4-6f59-4111-b44d-4c457b7dcf45.json
@@ -1,5 +1,5 @@
 {
-  "id" : "9232af2f-2a7b-4d67-af05-fcc609fd5466",
+  "id" : "bdea12a4-6f59-4111-b44d-4c457b7dcf45",
   "name" : "v1_messages",
   "request" : {
     "url" : "/v1/messages",
@@ -17,38 +17,40 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_messages-9232af2f-2a7b-4d67-af05-fcc609fd5466.txt",
+    "bodyFileName" : "v1_messages-bdea12a4-6f59-4111-b44d-4c457b7dcf45.txt",
     "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:41:20 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:41:19Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:41:19Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:41:19Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:41:19Z",
-      "request-id" : "req_011CYkRXKPuhrFQXZLzCf8GY",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
       "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "428",
       "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "382",
       "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-output-tokens-limit" : "1500000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:05:56Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:05:56Z",
+      "anthropic-ratelimit-tokens-remaining" : "9500000",
+      "set-cookie" : "_cfuvid=kkbjkAUxTU8G9Cd8gKiGmk0AXsIeGMUhOfcztg7nUrk-1775682356.2109106-1.0.1.1-Wzi9JdchbydyXYh4k0L98XV7_Mcn67RAm9AV4YObel4; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "10000",
       "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=430",
+      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
+      "anthropic-ratelimit-requests-remaining" : "9999",
+      "Content-Type" : "text/event-stream; charset=utf-8",
+      "CF-RAY" : "9e943ba64a9c647d-SEA",
+      "anthropic-ratelimit-tokens-limit" : "9500000",
       "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b41126db3d5ec-SEA"
+      "request-id" : "req_011CZrz42bCp3ybabDMcRVRf",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:05:56Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:05:56 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:05:56Z",
+      "Cache-Control" : "no-cache",
+      "anthropic-ratelimit-input-tokens-limit" : "8000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "1500000"
     }
   },
-  "uuid" : "9232af2f-2a7b-4d67-af05-fcc609fd5466",
+  "uuid" : "bdea12a4-6f59-4111-b44d-4c457b7dcf45",
   "persistent" : true,
   "scenarioName" : "scenario-1-v1-messages",
   "requiredScenarioState" : "scenario-1-v1-messages-2",
-  "insertionIndex" : 24
+  "insertionIndex" : 7
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-3cf94b89-b7f2-4925-97c7-b592da1c7128.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-ca81e846-884a-484e-a88b-e76ce1670233.json
similarity index 61%
rename from test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-3cf94b89-b7f2-4925-97c7-b592da1c7128.json
rename to test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-ca81e846-884a-484e-a88b-e76ce1670233.json
index c5977e06..b22f2413 100644
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-3cf94b89-b7f2-4925-97c7-b592da1c7128.json
+++ b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-ca81e846-884a-484e-a88b-e76ce1670233.json
@@ -1,5 +1,5 @@
 {
-  "id" : "3cf94b89-b7f2-4925-97c7-b592da1c7128",
+  "id" : "ca81e846-884a-484e-a88b-e76ce1670233",
   "name" : "v1_messages",
   "request" : {
     "url" : "/v1/messages",
@@ -17,38 +17,40 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_messages-3cf94b89-b7f2-4925-97c7-b592da1c7128.json",
+    "bodyFileName" : "v1_messages-ca81e846-884a-484e-a88b-e76ce1670233.json",
     "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:41:17 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:41:17Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:41:17Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:41:17Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:41:17Z",
-      "request-id" : "req_011CYkRX8N8nAktri448iud9",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
       "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
+      "x-envoy-upstream-service-time" : "750",
       "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "319",
       "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-output-tokens-limit" : "1500000",
+      "anthropic-ratelimit-output-tokens-reset" : "2026-04-08T21:05:53Z",
+      "anthropic-ratelimit-input-tokens-reset" : "2026-04-08T21:05:53Z",
+      "anthropic-ratelimit-tokens-remaining" : "9500000",
+      "set-cookie" : "_cfuvid=TAMSZxfpDXXvm7T3Uk9_Rh1QlVdcF5nSyrxz25XwQ4A-1775682353.126336-1.0.1.1-w6fdHGYHVke4ONUDu_T0fbKz72XeE8wzii_legTYxis; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com",
+      "anthropic-ratelimit-requests-limit" : "10000",
       "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
+      "server-timing" : "x-originResponse;dur=753",
+      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
+      "anthropic-ratelimit-requests-remaining" : "9999",
+      "Content-Type" : "application/json",
+      "CF-RAY" : "9e943b930dd5d465-SEA",
+      "anthropic-ratelimit-tokens-limit" : "9500000",
       "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b41026a2fc96d-SEA"
+      "request-id" : "req_011CZrz3oRh6RMs3y12FrTFK",
+      "anthropic-ratelimit-tokens-reset" : "2026-04-08T21:05:53Z",
+      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
+      "Date" : "Wed, 08 Apr 2026 21:05:53 GMT",
+      "X-Robots-Tag" : "none",
+      "anthropic-ratelimit-requests-reset" : "2026-04-08T21:05:53Z",
+      "anthropic-ratelimit-input-tokens-limit" : "8000000",
+      "anthropic-ratelimit-output-tokens-remaining" : "1500000"
     }
   },
-  "uuid" : "3cf94b89-b7f2-4925-97c7-b592da1c7128",
+  "uuid" : "ca81e846-884a-484e-a88b-e76ce1670233",
   "persistent" : true,
   "scenarioName" : "scenario-2-v1-messages",
   "requiredScenarioState" : "Started",
   "newScenarioState" : "scenario-2-v1-messages-2",
-  "insertionIndex" : 22
+  "insertionIndex" : 9
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-cf2b874d-3585-481a-b023-49e23a1d3b46.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-cf2b874d-3585-481a-b023-49e23a1d3b46.json
deleted file mode 100644
index d1d2baaa..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-cf2b874d-3585-481a-b023-49e23a1d3b46.json
+++ /dev/null
@@ -1,52 +0,0 @@
-{
-  "id" : "cf2b874d-3585-481a-b023-49e23a1d3b46",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0,\"stream\":true}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-cf2b874d-3585-481a-b023-49e23a1d3b46.txt",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:37:50 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:37:50Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:37:50Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:37:50Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:37:50Z",
-      "request-id" : "req_011CYkRFrHLGQy1GC2guXZzg",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "255",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b3bf31f96c66f-SEA"
-    }
-  },
-  "uuid" : "cf2b874d-3585-481a-b023-49e23a1d3b46",
-  "persistent" : true,
-  "insertionIndex" : 18
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-da340447-86ca-40db-90b6-89c169f2eb65.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-da340447-86ca-40db-90b6-89c169f2eb65.json
deleted file mode 100644
index f5110f99..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-da340447-86ca-40db-90b6-89c169f2eb65.json
+++ /dev/null
@@ -1,51 +0,0 @@
-{
-  "id" : "da340447-86ca-40db-90b6-89c169f2eb65",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages?beta=true",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-da340447-86ca-40db-90b6-89c169f2eb65.json",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 18:37:46 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T18:37:45Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T18:37:45Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T18:37:46Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T18:37:45Z",
-      "request-id" : "req_011CYkRFYmdNgym913iJmRkF",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "351",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d7b3bd97e78b9cd-SEA"
-    }
-  },
-  "uuid" : "da340447-86ca-40db-90b6-89c169f2eb65",
-  "persistent" : true,
-  "insertionIndex" : 15
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-dc027840-62bc-4d7f-b133-7cb6488d1087.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-dc027840-62bc-4d7f-b133-7cb6488d1087.json
deleted file mode 100644
index f21452e6..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-dc027840-62bc-4d7f-b133-7cb6488d1087.json
+++ /dev/null
@@ -1,51 +0,0 @@
-{
-  "id" : "dc027840-62bc-4d7f-b133-7cb6488d1087",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-dc027840-62bc-4d7f-b133-7cb6488d1087.json",
-    "headers" : {
-      "Date" : "Thu, 05 Mar 2026 00:34:37 GMT",
-      "Content-Type" : "application/json",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-05T00:34:37Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-05T00:34:37Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-05T00:34:37Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-05T00:34:37Z",
-      "request-id" : "req_011CYizexMgaqLxrHxNrN31b",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "363",
-      "vary" : "Accept-Encoding",
-      "cf-cache-status" : "DYNAMIC",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "CF-RAY" : "9d7509367ef2768a-SEA"
-    }
-  },
-  "uuid" : "dc027840-62bc-4d7f-b133-7cb6488d1087",
-  "persistent" : true,
-  "insertionIndex" : 7
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-de38eab2-9108-4498-9500-528b99d30d6f.json b/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-de38eab2-9108-4498-9500-528b99d30d6f.json
deleted file mode 100644
index 6a06a89a..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/anthropic/mappings/v1_messages-de38eab2-9108-4498-9500-528b99d30d6f.json
+++ /dev/null
@@ -1,52 +0,0 @@
-{
-  "id" : "de38eab2-9108-4498-9500-528b99d30d6f",
-  "name" : "v1_messages",
-  "request" : {
-    "url" : "/v1/messages?beta=true",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"max_tokens\":50,\"messages\":[{\"content\":\"What is the capital of France?\",\"role\":\"user\"}],\"model\":\"claude-3-haiku-20240307\",\"system\":\"You are a helpful assistant\",\"temperature\":0.0,\"stream\":true}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_messages-de38eab2-9108-4498-9500-528b99d30d6f.txt",
-    "headers" : {
-      "Date" : "Mon, 02 Mar 2026 19:22:17 GMT",
-      "Content-Type" : "text/event-stream; charset=utf-8",
-      "Cache-Control" : "no-cache",
-      "anthropic-ratelimit-requests-limit" : "10000",
-      "anthropic-ratelimit-requests-remaining" : "9999",
-      "anthropic-ratelimit-requests-reset" : "2026-03-02T19:22:16Z",
-      "anthropic-ratelimit-input-tokens-limit" : "8000000",
-      "anthropic-ratelimit-input-tokens-remaining" : "8000000",
-      "anthropic-ratelimit-input-tokens-reset" : "2026-03-02T19:22:16Z",
-      "anthropic-ratelimit-output-tokens-limit" : "1500000",
-      "anthropic-ratelimit-output-tokens-remaining" : "1500000",
-      "anthropic-ratelimit-output-tokens-reset" : "2026-03-02T19:22:16Z",
-      "anthropic-ratelimit-tokens-limit" : "9500000",
-      "anthropic-ratelimit-tokens-remaining" : "9500000",
-      "anthropic-ratelimit-tokens-reset" : "2026-03-02T19:22:16Z",
-      "request-id" : "req_011CYeoDfwxwmSTLHQ9vsKcp",
-      "strict-transport-security" : "max-age=31536000; includeSubDomains; preload",
-      "anthropic-organization-id" : "27796668-7351-40ac-acc4-024aee8995a5",
-      "Server" : "cloudflare",
-      "x-envoy-upstream-service-time" : "340",
-      "vary" : "Accept-Encoding",
-      "X-Robots-Tag" : "none",
-      "Content-Security-Policy" : "default-src 'none'; frame-ancestors 'none'",
-      "cf-cache-status" : "DYNAMIC",
-      "CF-RAY" : "9d62c4ed8de5c67f-SJC"
-    }
-  },
-  "uuid" : "de38eab2-9108-4498-9500-528b99d30d6f",
-  "persistent" : true,
-  "insertionIndex" : 3
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-16182011-e6cf-45cc-9e12-9ad6d27a2aec.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-05a54346-5fc6-4824-ae59-a6c4331a1b76.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-16182011-e6cf-45cc-9e12-9ad6d27a2aec.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-05a54346-5fc6-4824-ae59-a6c4331a1b76.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-1f7970aa-2c29-4da1-9bce-070eb04c5cc0.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-05c78836-4d00-4e98-b2bc-9cc63b7c4fdc.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-1f7970aa-2c29-4da1-9bce-070eb04c5cc0.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-05c78836-4d00-4e98-b2bc-9cc63b7c4fdc.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-27af48ee-9e48-46e3-a72a-505220cc4fde.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-0b560d16-f935-4fd2-9e5f-f6239759ee86.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-27af48ee-9e48-46e3-a72a-505220cc4fde.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-0b560d16-f935-4fd2-9e5f-f6239759ee86.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-2cbf1159-033a-4577-98cc-eb14679c79f2.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-0e542fd4-db95-465c-9a35-d74a74d8228d.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-2cbf1159-033a-4577-98cc-eb14679c79f2.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-0e542fd4-db95-465c-9a35-d74a74d8228d.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-3686de1f-c08e-4155-aaed-6f017174252d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-16710250-694c-40ac-8a16-30991db4c3ab.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-3686de1f-c08e-4155-aaed-6f017174252d.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-16710250-694c-40ac-8a16-30991db4c3ab.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-3a135720-cda8-46f1-b29e-057d078fdf47.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-22b6e58b-f36b-4e8d-8c95-9ee34ec5ed70.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-3a135720-cda8-46f1-b29e-057d078fdf47.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-22b6e58b-f36b-4e8d-8c95-9ee34ec5ed70.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-41a2eb56-2db6-4bbc-a5da-a543d30a7d0e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-2bc5505d-8e52-4855-aa71-ec93086486cb.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-41a2eb56-2db6-4bbc-a5da-a543d30a7d0e.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-2bc5505d-8e52-4855-aa71-ec93086486cb.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-4618d477-16ee-42e3-977a-760014fcf317.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-4a78dc19-bd47-4b47-8ce6-50f41192195e.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-4618d477-16ee-42e3-977a-760014fcf317.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-4a78dc19-bd47-4b47-8ce6-50f41192195e.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-484ebdf0-7f2a-4625-b3c9-44430d0e0ccc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-4f2596b7-e287-4723-a9dc-fd2ad1063742.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-484ebdf0-7f2a-4625-b3c9-44430d0e0ccc.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-4f2596b7-e287-4723-a9dc-fd2ad1063742.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-5535a856-31cf-4341-ba6d-cf5eeaf21060.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-56c61687-3405-4c09-ab40-271bc54c8eaa.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-5535a856-31cf-4341-ba6d-cf5eeaf21060.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-56c61687-3405-4c09-ab40-271bc54c8eaa.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-69a7d8ab-cdaa-41c0-9526-1a9f7b20fc37.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-606c26c9-be94-4c86-933e-b673f52e5b19.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-69a7d8ab-cdaa-41c0-9526-1a9f7b20fc37.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-606c26c9-be94-4c86-933e-b673f52e5b19.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-7b020c11-8526-4015-b99e-c484af08ef7d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-6a0848d1-eaca-4c46-bae5-b125508c784e.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-7b020c11-8526-4015-b99e-c484af08ef7d.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-6a0848d1-eaca-4c46-bae5-b125508c784e.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-7c2175d7-08d7-4548-a27f-6a5a294b0b41.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-759d12b9-6ea0-4626-a78e-fee98c968cd0.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-7c2175d7-08d7-4548-a27f-6a5a294b0b41.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-759d12b9-6ea0-4626-a78e-fee98c968cd0.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-80e1d5d8-e0cc-4e71-a734-3f7e930ba46a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-781812c8-b6c4-4d8e-99a2-3561e8ab3abc.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-80e1d5d8-e0cc-4e71-a734-3f7e930ba46a.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-781812c8-b6c4-4d8e-99a2-3561e8ab3abc.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-93450139-3433-4592-9bf4-4c19ec790822.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-7e567525-8382-4555-b114-14e4fc3c4660.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-93450139-3433-4592-9bf4-4c19ec790822.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-7e567525-8382-4555-b114-14e4fc3c4660.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-a1a4ba24-9737-4c42-9f2b-b2e43441ed0e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-8008136f-69a7-4faf-9fcf-21456e9b10db.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-a1a4ba24-9737-4c42-9f2b-b2e43441ed0e.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-8008136f-69a7-4faf-9fcf-21456e9b10db.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-a78a4e9e-b092-4464-911a-6ed2db700751.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-80581847-dd25-409f-8755-4b33aa69aee8.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-a78a4e9e-b092-4464-911a-6ed2db700751.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-80581847-dd25-409f-8755-4b33aa69aee8.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-afff7bb2-af0e-485a-a95b-cd1fd0cfa8cc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-84d6dd11-cbb0-4b17-be44-c652b3764846.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-afff7bb2-af0e-485a-a95b-cd1fd0cfa8cc.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-84d6dd11-cbb0-4b17-be44-c652b3764846.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-b11a37c0-a4bb-49cb-b6e9-666b4d5ecb1f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-982796de-3113-4929-b363-c8674638f65c.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-b11a37c0-a4bb-49cb-b6e9-666b4d5ecb1f.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-982796de-3113-4929-b363-c8674638f65c.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-b6bb3d63-3c6f-49df-8d37-df606beb0693.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-9c3a1abc-552c-4596-919a-7e2fc9371273.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-b6bb3d63-3c6f-49df-8d37-df606beb0693.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-9c3a1abc-552c-4596-919a-7e2fc9371273.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-b7fa8ce1-f10c-47ac-b359-ddbb0c1b1ac7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-b7fa8ce1-f10c-47ac-b359-ddbb0c1b1ac7.json
new file mode 100644
index 00000000..9a18a482
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-b7fa8ce1-f10c-47ac-b359-ddbb0c1b1ac7.json
@@ -0,0 +1 @@
+{"org_info":[{"id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","name":"braintrustdata.com","api_url":"https://staging-api.braintrust.dev","git_metadata":{"fields":["commit","branch","tag","author_name","author_email","commit_message","commit_time","dirty"],"collect":"some"},"is_universal_api":true,"proxy_url":"https://staging-api.braintrust.dev","realtime_url":"wss://realtime.braintrustapi.com"}]}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-bed02d58-ffff-422d-b13f-6b091acaaf22.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-bed02d58-ffff-422d-b13f-6b091acaaf22.json
new file mode 100644
index 00000000..9a18a482
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-bed02d58-ffff-422d-b13f-6b091acaaf22.json
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-d7048ba1-ee7e-4abc-894e-90267aaf249b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-d7048ba1-ee7e-4abc-894e-90267aaf249b.json
new file mode 100644
index 00000000..9a18a482
--- /dev/null
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-f87c31f2-aed8-45d3-8976-91d44c3925f0.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/api_apikey_login-f87c31f2-aed8-45d3-8976-91d44c3925f0.json
new file mode 100644
index 00000000..9a18a482
--- /dev/null
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-04616db9-d56c-410f-adf7-fcb68ba1614b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-04616db9-d56c-410f-adf7-fcb68ba1614b.json
new file mode 100644
index 00000000..fe6c3ca4
--- /dev/null
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-0809fa2c-f934-4e68-aa6c-d4800988615d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-0809fa2c-f934-4e68-aa6c-d4800988615d.json
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-0826723c-ec2e-47a6-9b30-8cefd9616d16.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-0826723c-ec2e-47a6-9b30-8cefd9616d16.json
new file mode 100644
index 00000000..3105d969
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-105429c4-dada-46d8-bd0a-cd154324b41c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-105429c4-dada-46d8-bd0a-cd154324b41c.json
new file mode 100644
index 00000000..ecf8735a
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-105429c4-dada-46d8-bd0a-cd154324b41c.json
@@ -0,0 +1 @@
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-20344aa0-82d3-45a1-a0a8-d1a34775af7a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-20344aa0-82d3-45a1-a0a8-d1a34775af7a.json
deleted file mode 100644
index 4eb58857..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-20344aa0-82d3-45a1-a0a8-d1a34775af7a.json
+++ /dev/null
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-{"data":[{"name":"test-distributed-trace-parent","root_span_id":"1cd73a8507ab9c0feab656e9dcaf2884","span_id":"fc14af6cd03b6009","span_parents":null},{"name":"Chat Completion","root_span_id":"1cd73a8507ab9c0feab656e9dcaf2884","span_id":"70f664d1-262e-4b79-b2a1-fe6a91b0b4a4","span_parents":["dba5dce5-c7a5-4461-bb49-3d69789fac57"]},{"name":"close-enough-judge","root_span_id":"1cd73a8507ab9c0feab656e9dcaf2884","span_id":"dba5dce5-c7a5-4461-bb49-3d69789fac57","span_parents":["fc14af6cd03b6009"]}],"schema":{"type":"array","items":{"type":"object","properties":{"span_id":{"type":"string","description":"A unique identifier used to link different project logs events together as part of a full trace. See the [tracing guide](https://www.braintrust.dev/docs/instrument) for full details on tracing"},"span_parents":{"anyOf":[{"type":"array","items":{"type":"string"}},{"type":"null"}]},"root_span_id":{"type":"string","description":"A unique identifier for the trace this project logs event belongs to"},"name":{"type":["string","null"],"description":"Name of the span, for display purposes only"}}}},"cursor":"aZVJ0a4gAAA","realtime_state":{"type":"on","minimum_xact_id":null,"read_bytes":3816,"actual_xact_id":"1000196682162549343"},"freshness_state":{"last_processed_xact_id":"1000196682047588825","last_considered_xact_id":"1000196682162549343"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-2828901c-e14f-4f60-a8ca-8534740d885b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-2828901c-e14f-4f60-a8ca-8534740d885b.json
new file mode 100644
index 00000000..80a2f3ab
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-2828901c-e14f-4f60-a8ca-8534740d885b.json
@@ -0,0 +1 @@
+{"data":[{"_async_scoring_state":null,"_pagination_key":"p07626496976559210511","_xact_id":"1000196963361611879","audit_data":[{"_xact_id":"1000196963361611879","audit_data":{"action":"upsert"},"metadata":{},"source":"api"}],"classifications":null,"comments":null,"context":null,"created":"2026-04-08T21:03:03.010Z","error":null,"expected":null,"facets":null,"id":"a73422ab2624c6e3","input":[{"content":"Look at this sequence: 2, 6, 12, 20, 30. What is the pattern and what would be the formula for the nth term?\n","role":"user"}],"is_root":false,"log_id":"g","metadata":{"braintrust.parent":"project_name:java-unit-test","model":"o4-mini","provider":"openai","request_base_uri":"http://localhost:41533","request_method":"POST","request_path":"responses"},"metrics":{"completion_reasoning_tokens":896,"completion_tokens":1018,"end":1775682196.3536322,"prompt_tokens":41,"start":1775682183.0109835,"tokens":1059},"org_id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","origin":null,"output":[{"id":"rs_057e67b8f6bc5bec0069d6c288348881968097f72c458b4b6a","summary":[{"text":"**Identifying the sequence pattern**\n\nThe user has shared a sequence: 2, 6, 12, 20, 30. I’m noticing this follows the pattern of n(n+1). Basically, for n=1 to 5, I have 1*2=2, 2*3=6, and so on. So, the nth term can be expressed as T_n = n(n+1) or n^2 + n. These numbers are pronic or oblong numbers as well. I can also see that they align with triangular numbers multiplied by 2. Ultimately, I think the formula is simply a_n = n(n+1).","type":"summary_text"},{"text":"**Defining the pronic numbers**\n\nSo starting from n≥1, I see that the nth term can be expressed as T_n = n(n+1), indicating that these numbers are pronic numbers, which are products of two consecutive integers. The differences between the terms increase by 2 each time (4, 6, 8, 10), confirming it's a quadratic pattern. I’ve derived that a_n = n^2 + n fits this sequence. If starting at n=0, the formula adjusts to a_n = (n+1)(n+2). So, a_n = n(n+1) is a straightforward answer!","type":"summary_text"}],"type":"reasoning"},{"content":[{"annotations":[],"logprobs":[],"text":"The terms are  \n 2 = 1·2  \n 6 = 2·3  \n12 = 3·4  \n20 = 4·5  \n30 = 5·6  \n\nIn other words, the n-th term is the product of two consecutive integers.  Equivalently\n\n aₙ = n(n + 1) = n² + n,  for n = 1, 2, 3, …","type":"output_text"}],"id":"msg_057e67b8f6bc5bec0069d6c293acec819691d5b3c799159dad","role":"assistant","status":"completed","type":"message"}],"project_id":"6ae68365-7620-4630-921b-bac416634fc8","root_span_id":"749bf197b1337ee8f4a939cd996b0c97","scores":null,"span_attributes":{"name":"responses","type":"llm"},"span_id":"a73422ab2624c6e3","span_parents":["195f657305d2bb7a"],"tags":null},{"_async_scoring_state":null,"_pagination_key":"p07626497021210525697","_xact_id":"1000196963362293204","audit_data":[{"_xact_id":"1000196963362293204","audit_data":{"action":"upsert"},"metadata":{},"source":"api"}],"classifications":null,"comments":null,"context":null,"created":"2026-04-08T21:03:16.408Z","error":null,"expected":null,"facets":null,"id":"9aeb6a50a78a09dd","input":[{"content":"Look at this sequence: 2, 6, 12, 20, 30. What is the pattern and what would be the formula for the nth term?\n","role":"user"},{"id":"rs_057e67b8f6bc5bec0069d6c288348881968097f72c458b4b6a","summary":[{"text":"**Identifying the sequence pattern**\n\nThe user has shared a sequence: 2, 6, 12, 20, 30. I’m noticing this follows the pattern of n(n+1). Basically, for n=1 to 5, I have 1*2=2, 2*3=6, and so on. So, the nth term can be expressed as T_n = n(n+1) or n^2 + n. These numbers are pronic or oblong numbers as well. I can also see that they align with triangular numbers multiplied by 2. Ultimately, I think the formula is simply a_n = n(n+1).","type":"summary_text"},{"text":"**Defining the pronic numbers**\n\nSo starting from n≥1, I see that the nth term can be expressed as T_n = n(n+1), indicating that these numbers are pronic numbers, which are products of two consecutive integers. The differences between the terms increase by 2 each time (4, 6, 8, 10), confirming it's a quadratic pattern. I’ve derived that a_n = n^2 + n fits this sequence. If starting at n=0, the formula adjusts to a_n = (n+1)(n+2). So, a_n = n(n+1) is a straightforward answer!","type":"summary_text"}],"type":"reasoning"},{"content":[{"annotations":[],"logprobs":[],"text":"The terms are  \n 2 = 1·2  \n 6 = 2·3  \n12 = 3·4  \n20 = 4·5  \n30 = 5·6  \n\nIn other words, the n-th term is the product of two consecutive integers.  Equivalently\n\n aₙ = n(n + 1) = n² + n,  for n = 1, 2, 3, …","type":"output_text"}],"id":"msg_057e67b8f6bc5bec0069d6c293acec819691d5b3c799159dad","role":"assistant","status":"completed","type":"message"},{"content":"Using the pattern you discovered, what would be the 10th term? And can you find the sum of the first 10 terms?","role":"user"}],"is_root":false,"log_id":"g","metadata":{"braintrust.parent":"project_name:java-unit-test","model":"o4-mini","provider":"openai","request_base_uri":"http://localhost:41533","request_method":"POST","request_path":"responses"},"metrics":{"completion_reasoning_tokens":512,"completion_tokens":715,"end":1775682207.6709602,"prompt_tokens":173,"start":1775682196.4083474,"tokens":888},"org_id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","origin":null,"output":[{"id":"rs_057e67b8f6bc5bec0069d6c294db08819690fffb2a590f15de","summary":[{"text":"**Calculating sum formulas**\n\nThe user has a formula \\( a_n = n(n+1) \\) and is looking to find \\( a_{10} \\), which is \\( 10 \\times 11 = 110 \\). Next, I need to compute \\( S_{10} = \\sum_{n=1}^{10} n(n+1) \\). This simplifies to finding the sums of \\( n^2 \\) and \\( n \\). \n\nAfter calculating, I find that \\( S_{10} = 440 \\). The derived general formula for this sum is \\( \\sum_{k=1}^{n} k(k+1) = \\frac{n(n+1)(n+2)}{3} \\). So, the answers are \\( a_{10} = 110 \\) and the sum equals 440.","type":"summary_text"},{"text":"**Summarizing values and formulas**\n\nI can provide clear answers now: the term \\( a_{10} = 10 \\times 11 = 110 \\). Next, to find the sum \\( S_{10} = \\sum_{n=1}^{10} n(n+1) \\), I can use the formula \\( S_n = \\frac{n(n+1)(n+2)}{3} \\), which gives me \\( \\frac{10 \\times 11 \\times 12}{3} = 440 \\). So, the results are \\( a_{10} = 110 \\) and \\( S_{10} = 440 \\). Let's finalize this presentation!","type":"summary_text"}],"type":"reasoning"},{"content":[{"annotations":[],"logprobs":[],"text":"The 10th term is  \n a₁₀ = 10·(10 + 1) = 10·11 = 110.  \n\nThe sum of the first 10 terms is  \n S₁₀ = ∑_{k=1}^{10} k(k+1)  \n   = ∑k² + ∑k  \n   = (10·11·21)/6 + (10·11)/2  \n   = 385 + 55  \n   = 440.  \n\nEquivalently one can use the closed‐form  \n Sₙ = n(n+1)(n+2)/3  \nso  \n S₁₀ = 10·11·12/3 = 440.","type":"output_text"}],"id":"msg_057e67b8f6bc5bec0069d6c29e93348196ad85685abd20a1a5","role":"assistant","status":"completed","type":"message"}],"project_id":"6ae68365-7620-4630-921b-bac416634fc8","root_span_id":"749bf197b1337ee8f4a939cd996b0c97","scores":null,"span_attributes":{"name":"responses","type":"llm"},"span_id":"9aeb6a50a78a09dd","span_parents":["195f657305d2bb7a"],"tags":null}],"schema":{"type":"array","items":{"type":"object","properties":{"id":{"type":"string","description":"A unique identifier for the project logs event. 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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-429a7e1d-67c5-4c74-9a2e-9548c23a2ec2.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-429a7e1d-67c5-4c74-9a2e-9548c23a2ec2.json
new file mode 100644
index 00000000..eb617d44
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-48e9a7f1-0797-4c88-a91b-4bfcfd65b631.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-48e9a7f1-0797-4c88-a91b-4bfcfd65b631.json
new file mode 100644
index 00000000..3b135183
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-48e9a7f1-0797-4c88-a91b-4bfcfd65b631.json
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-4967a259-82b9-4828-a338-e92e936c2c99.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-4967a259-82b9-4828-a338-e92e936c2c99.json
new file mode 100644
index 00000000..2edb56b5
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-4b4b0168-674f-468e-a431-0f568e23ee1e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-4b4b0168-674f-468e-a431-0f568e23ee1e.json
new file mode 100644
index 00000000..51066429
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-4b4b0168-674f-468e-a431-0f568e23ee1e.json
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-5ca6433f-f9fa-416e-ac5c-085100b0c23d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-5ca6433f-f9fa-416e-ac5c-085100b0c23d.json
new file mode 100644
index 00000000..7c866e06
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-63f2a6bc-4e14-49da-96dc-3b15725d58ee.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-63f2a6bc-4e14-49da-96dc-3b15725d58ee.json
new file mode 100644
index 00000000..fb5880e3
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-65198432-9bda-4f59-b0ca-3a6739e31220.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-65198432-9bda-4f59-b0ca-3a6739e31220.json
new file mode 100644
index 00000000..0b506d8a
--- /dev/null
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-6d0bbaef-f8ac-4160-9ec4-03aad29f327d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-6d0bbaef-f8ac-4160-9ec4-03aad29f327d.json
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-7034e59e-337f-4a0e-a886-0f16a43c83fe.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-7034e59e-337f-4a0e-a886-0f16a43c83fe.json
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index 00000000..b7e3205d
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index 00000000..abb706b5
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-7a7d3013-84cd-4013-a6c0-12a0be75c1a8.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-7a7d3013-84cd-4013-a6c0-12a0be75c1a8.json
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index 00000000..3f696573
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index 00000000..daa884f9
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-7320bb58-2f2e-4187-86b5-98c319e6f1e9.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-8ec14f09-206a-4621-81e3-6597bca7d6ed.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-7320bb58-2f2e-4187-86b5-98c319e6f1e9.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-8ec14f09-206a-4621-81e3-6597bca7d6ed.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-96c61fea-07a1-4578-a8e0-4d3571e5c956.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-96c61fea-07a1-4578-a8e0-4d3571e5c956.json
new file mode 100644
index 00000000..699b8327
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-96c61fea-07a1-4578-a8e0-4d3571e5c956.json
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-9a6d9082-7084-4988-81b7-e468c69643b1.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-9a6d9082-7084-4988-81b7-e468c69643b1.json
new file mode 100644
index 00000000..8378ef33
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-9a6d9082-7084-4988-81b7-e468c69643b1.json
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-a74c0fbe-db4f-4050-81d2-56ba6660570f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-a74c0fbe-db4f-4050-81d2-56ba6660570f.json
new file mode 100644
index 00000000..c1eeeaee
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-a74c0fbe-db4f-4050-81d2-56ba6660570f.json
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Therefore, I identify the sequence as pronic numbers, which is expressed as a_n = n(n+1). Ultimately, this tells me that the nth term for n >= 1 is n(n+1).","type":"summary_text"},{"text":"**Explaining the pronic numbers sequence**\n\nI need to clarify that if we start the sequence at n=1, then the formula for the nth term is a_n = n(n+1), which represents the product of successive integers, or pronic numbers. The differences between terms increase by 2, indicating a quadratic sequence. Therefore, I conclude that the pattern is 2, 6, 12, 20, 30, with the general formula being a_n = n^2 + n. If starting at n=0, it would shift to a_n = (n+1)(n+2).","type":"summary_text"}],"type":"reasoning"},{"content":[{"annotations":[],"logprobs":[],"text":"The “gaps” between terms are  \n6–2=4, 12–6=6, 20–12=8, 30–20=10,…  \nso the differences are 4, 6, 8, 10,… i.e. they increase by 2 each time.  A sequence with linearly growing differences is quadratic.  In fact one can check that\n\na₁=2, a₂=6, a₃=12 ⇒ aₙ=n²+n.\n\nEquivalently\n\naₙ=n(n+1),  for n=1,2,3,…\n\nwhich indeed gives 1·2=2, 2·3=6, 3·4=12, 4·5=20, 5·6=30,…","type":"output_text"}],"id":"msg_0a904223c9c2dec80069d6c2a75bec8190a04ffb44dd56eb6f","role":"assistant","status":"completed","type":"message"},{"content":"Using the pattern you discovered, what would be the 10th term? And can you find the sum of the first 10 terms?","role":"user"}],"is_root":false,"log_id":"g","metadata":{"braintrust.parent":"project_name:java-unit-test","model":"o4-mini","provider":"openai","request_base_uri":"http://localhost:41533","request_method":"POST","request_path":"responses"},"metrics":{"completion_reasoning_tokens":384,"completion_tokens":612,"end":1775682225.2812881,"prompt_tokens":246,"start":1775682216.2929904,"tokens":858},"org_id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","origin":null,"output":[{"id":"rs_0a904223c9c2dec80069d6c2a8f4f88190a1206bee8f92d110","summary":[{"text":"**Calculating term and sum**\n\nThe user is asking for the 10th term from the sequence defined by a_n = n(n+1). To find this, I calculate a_10, which is 10*11, giving me 110. Next, for the sum of the first 10 terms, I use the formula for n^2 and n. The sum of n^2 from 1 to 10 is 385, and the sum of n is 55. Adding these together gives a total of 440. So, I conclude that the 10th term is 110 and the sum is 440.","type":"summary_text"},{"text":"**Summarizing the calculations**\n\nI want to include the formulas for clarity. The 10th term is a_10, which equals 110, and the sum of the first 10 terms is 440. There's a neat formula for this sum: the sum of a_n = sum_{n=1}^N n(n+1) = N(N+1)(N+2)/3. For N=10, it checks out as 10*11*12/3 = 440. I can mention this sum formula as part of my response. So, to summarize: the answers are 110 for the term and 440 for the sum.","type":"summary_text"}],"type":"reasoning"},{"content":[{"annotations":[],"logprobs":[],"text":"The nth term is aₙ = n(n+1).  \nSo for n=10:  \na₁₀ = 10·11 = 110.  \n\nThe sum of the first 10 terms is  \nS₁₀ = ∑ₙ₌₁¹⁰ n(n+1) = ∑n² + ∑n  \n   = (10·11·21)/6 + (10·11)/2  \n   = 385 + 55  \n   = 440.  \n\nEquivalently you can use the closed‐form  \n∑ₙ₌₁ᴺ n(n+1) = N(N+1)(N+2)/3,  \nso for N=10: 10·11·12/3 = 440.","type":"output_text"}],"id":"msg_0a904223c9c2dec80069d6c2b05f8881909bd0fb55c2a56fd6","role":"assistant","status":"completed","type":"message"}],"project_id":"6ae68365-7620-4630-921b-bac416634fc8","root_span_id":"d14c2bbf0f2035961050783a8f15fa6b","scores":null,"span_attributes":{"name":"responses","type":"llm"},"span_id":"5eef9f4ccd957f1c","span_parents":["56a080fc3510315a"],"tags":null}],"schema":{"type":"array","items":{"type":"object","properties":{"id":{"type":"string","description":"A unique identifier for the project logs event. 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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-b7c4478b-22c9-4aad-9fdb-2c76a3f5713e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-b7c4478b-22c9-4aad-9fdb-2c76a3f5713e.json
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--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-b7c4478b-22c9-4aad-9fdb-2c76a3f5713e.json
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-bd61f9b9-6b8a-446a-96ce-786bfde97ffb.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-bd61f9b9-6b8a-446a-96ce-786bfde97ffb.json
new file mode 100644
index 00000000..c74a1925
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-bd61f9b9-6b8a-446a-96ce-786bfde97ffb.json
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What is the pattern and what would be the formula for the nth term?\n","role":"user"}],"is_root":false,"log_id":"g","metadata":{"braintrust.parent":"project_name:java-unit-test","model":"o4-mini","provider":"openai","request_base_uri":"http://localhost:41533","request_method":"POST","request_path":"responses"},"metrics":{"completion_reasoning_tokens":1536,"completion_tokens":1809,"end":1775682213.1888056,"prompt_tokens":41,"start":1775682196.5013328,"tokens":1850},"org_id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","origin":null,"output":[{"id":"rs_077f768058f266c60069d6c294fe7c81958f56dbbf226ff9a6","summary":[{"text":"**Identifying the sequence pattern**\n\nThe user has given me the sequence: 2, 6, 12, 20, 30, and they want to find the pattern. I see that it's related to the formula n(n+1). Checking this, I find that for n=1, it produces 2; for n=2, it gives 6; and so on. This indicates that the formula indeed works. Also, there's an alternative interpretation as triangular numbers multiplied by 2. The differences suggest a quadratic pattern, confirming that a_n = n(n+1) is correct.","type":"summary_text"},{"text":"**Explaining the pronic numbers**\n\nThe pattern here is about pronic numbers, which are produced by multiplying two consecutive integers. So, I can express this as a_n = n(n+1). This means the numbers 2, 6, 12, etc., are also twice the triangular numbers. I want to clarify that the differences between the terms increase by 2 each time, showing that it’s a quadratic sequence. The nth term formula remains a_n = n(n+1), typically starting from n=1. Therefore, the answer is a_n = n^2 + n for n≥1.","type":"summary_text"},{"text":"**Explaining the sequence pattern**\n\nThe user provided the sequence: 2, 6, 12, 20, 30, and asks for the pattern and nth term formula. I see that the differences increase by 2: +4, +6, +8, +10. This indicates it follows the pronic numbers, meaning the formula is a_n = n(n+1). To clarify, each term is a product of two consecutive integers. Thus, the final message should state: pattern: product of consecutive integers, formula: a_n = n(n+1). This captures the essence of the sequence!","type":"summary_text"}],"type":"reasoning"},{"content":[{"annotations":[],"logprobs":[],"text":"The pattern is that the differences go up by 2 each time:\n\n  6–2=4,  12–6=6,  20–12=8,  30–20=10, …\n\nA quick way to see it’s quadratic is to note the second differences are constant (2), so  \naₙ=An²+Bn+C.  Plugging in n=1,2,3 gives A=1, B=1, C=0.\n\nEquivalently, each term is the product of two consecutive integers:\n\n  aₙ = n·(n+1).\n\nSo for n=1,2,3,4,5,… you get\n\n  a₁=1·2=2,  a₂=2·3=6,  a₃=3·4=12,  a₄=4·5=20,  a₅=5·6=30, …\n\nIn closed-form:  \n\n  aₙ = n² + n = n(n+1).","type":"output_text"}],"id":"msg_077f768058f266c60069d6c2a470988195bb350a791bfef4c7","role":"assistant","status":"completed","type":"message"}],"project_id":"6ae68365-7620-4630-921b-bac416634fc8","root_span_id":"2ad9340b42b9bce55fc49d6ebe753570","scores":null,"span_attributes":{"name":"responses","type":"llm"},"span_id":"456e43c29aeed761","span_parents":["f535f55a83b84359"],"tags":null},{"_async_scoring_state":null,"_pagination_key":"p07626497092236935170","_xact_id":"1000196963363376981","audit_data":[{"_xact_id":"1000196963363376981","audit_data":{"action":"upsert"},"metadata":{},"source":"api"}],"classifications":null,"comments":null,"context":null,"created":"2026-04-08T21:03:33.211Z","error":null,"expected":null,"facets":null,"id":"215c78554f2e9a53","input":[{"content":"Look at this sequence: 2, 6, 12, 20, 30. What is the pattern and what would be the formula for the nth term?\n","role":"user"},{"id":"rs_077f768058f266c60069d6c294fe7c81958f56dbbf226ff9a6","summary":[{"text":"**Identifying the sequence pattern**\n\nThe user has given me the sequence: 2, 6, 12, 20, 30, and they want to find the pattern. I see that it's related to the formula n(n+1). Checking this, I find that for n=1, it produces 2; for n=2, it gives 6; and so on. This indicates that the formula indeed works. Also, there's an alternative interpretation as triangular numbers multiplied by 2. The differences suggest a quadratic pattern, confirming that a_n = n(n+1) is correct.","type":"summary_text"},{"text":"**Explaining the pronic numbers**\n\nThe pattern here is about pronic numbers, which are produced by multiplying two consecutive integers. So, I can express this as a_n = n(n+1). This means the numbers 2, 6, 12, etc., are also twice the triangular numbers. I want to clarify that the differences between the terms increase by 2 each time, showing that it’s a quadratic sequence. The nth term formula remains a_n = n(n+1), typically starting from n=1. Therefore, the answer is a_n = n^2 + n for n≥1.","type":"summary_text"},{"text":"**Explaining the sequence pattern**\n\nThe user provided the sequence: 2, 6, 12, 20, 30, and asks for the pattern and nth term formula. I see that the differences increase by 2: +4, +6, +8, +10. This indicates it follows the pronic numbers, meaning the formula is a_n = n(n+1). To clarify, each term is a product of two consecutive integers. Thus, the final message should state: pattern: product of consecutive integers, formula: a_n = n(n+1). This captures the essence of the sequence!","type":"summary_text"}],"type":"reasoning"},{"content":[{"annotations":[],"logprobs":[],"text":"The pattern is that the differences go up by 2 each time:\n\n  6–2=4,  12–6=6,  20–12=8,  30–20=10, …\n\nA quick way to see it’s quadratic is to note the second differences are constant (2), so  \naₙ=An²+Bn+C.  Plugging in n=1,2,3 gives A=1, B=1, C=0.\n\nEquivalently, each term is the product of two consecutive integers:\n\n  aₙ = n·(n+1).\n\nSo for n=1,2,3,4,5,… you get\n\n  a₁=1·2=2,  a₂=2·3=6,  a₃=3·4=12,  a₄=4·5=20,  a₅=5·6=30, …\n\nIn closed-form:  \n\n  aₙ = n² + n = n(n+1).","type":"output_text"}],"id":"msg_077f768058f266c60069d6c2a470988195bb350a791bfef4c7","role":"assistant","status":"completed","type":"message"},{"content":"Using the pattern you discovered, what would be the 10th term? And can you find the sum of the first 10 terms?","role":"user"}],"is_root":false,"log_id":"g","metadata":{"braintrust.parent":"project_name:java-unit-test","model":"o4-mini","provider":"openai","request_base_uri":"http://localhost:41533","request_method":"POST","request_path":"responses"},"metrics":{"completion_reasoning_tokens":320,"completion_tokens":518,"end":1775682221.8740969,"prompt_tokens":299,"start":1775682213.2112975,"tokens":817},"org_id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","origin":null,"output":[{"id":"rs_077f768058f266c60069d6c2a5f0dc819583e17b2822b688d9","summary":[{"text":"**Calculating terms and sum**\n\nI need to find the 10th term of the sequence represented by 2, 6, 12, 20, and 30, which follows the formula a_n = n(n+1). For n=10, a10 = 10 * 11 = 110. \n\nNext, I'll calculate the sum of the first 10 terms. Using the sum formula, it equals S = sum of n^2 plus sum of n. I find S = 440 for both methods, either by directly summing or using another sum formula. So, the answers are a10 = 110 and the total sum is 440.","type":"summary_text"},{"text":"**Presenting results simply**\n\nI think keeping the formatting straightforward is a good idea. The 10th term is a10 = 110, and the sum of the first 10 terms is 440. This way, the information is clear and easy to understand. I feel satisfied with these results, and I’ll go ahead and deliver this information without any complications. Simplicity often works best, after all!","type":"summary_text"}],"type":"reasoning"},{"content":[{"annotations":[],"logprobs":[],"text":"The 10th term is  \na₁₀ = 10·(10 + 1) = 10·11 = 110.  \n\nThe sum of the first 10 terms is  \nS₁₀ = ∑ₙ₌₁¹⁰ n(n+1) = ∑n² + ∑n  \n    = [10·11·21⁄6] + [10·11⁄2]  \n    = 385 + 55  \n    = 440.  \n\nEquivalently, there’s a closed‐form  \nS₁₀ = 10·11·12⁄3 = 440.","type":"output_text"}],"id":"msg_077f768058f266c60069d6c2ad2548819584f260de71659b37","role":"assistant","status":"completed","type":"message"}],"project_id":"6ae68365-7620-4630-921b-bac416634fc8","root_span_id":"2ad9340b42b9bce55fc49d6ebe753570","scores":null,"span_attributes":{"name":"responses","type":"llm"},"span_id":"215c78554f2e9a53","span_parents":["f535f55a83b84359"],"tags":null}],"schema":{"type":"array","items":{"type":"object","properties":{"id":{"type":"string","description":"A unique identifier for the project logs event. 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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-cd978a97-af82-4bab-ab14-28b79986cc23.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-cd978a97-af82-4bab-ab14-28b79986cc23.json
new file mode 100644
index 00000000..514ccf3d
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-cf97050d-fa31-4004-a751-7b25584f0de3.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-cf97050d-fa31-4004-a751-7b25584f0de3.json
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-f495c0f6-4964-4dcc-a3c7-8973d2383946.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/btql-f495c0f6-4964-4dcc-a3c7-8973d2383946.json
new file mode 100644
index 00000000..3c0452ee
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For example, in an app that generates SQL queries, the `output` should be the _result_ of the SQL query generated by the model, not the query itself, because there may be multiple valid queries that answer a single question."},"expected":{"description":"The ground truth value (an arbitrary, JSON serializable object) that you'd compare to `output` to determine if your `output` value is correct or not. Braintrust currently does not compare `output` to `expected` for you, since there are so many different ways to do that correctly. Instead, these values are just used to help you navigate while digging into analyses. However, we may later use these values to re-score outputs or fine-tune your models."},"error":{"description":"The error that occurred, if any."},"scores":{"anyOf":[{"type":"object","additionalProperties":{"anyOf":[{"type":"number","minimum":0,"maximum":1},{"type":"null"}]},"properties":{}},{"type":"null"}]},"metadata":{"anyOf":[{"type":"object","properties":{"model":{"description":"The model used for this example","type":["string","null"]}},"additionalProperties":{}},{"type":"null"}]},"tags":{"anyOf":[{"type":"array","items":{"type":"string"}},{"type":"null"}]},"metrics":{"anyOf":[{"type":"object","properties":{"start":{"description":"A unix timestamp recording when the section of code which produced the project logs event started","type":["number","null"]},"end":{"description":"A unix timestamp recording when the section of code which produced the project logs event finished","type":["number","null"]},"prompt_tokens":{"anyOf":[{"type":"integer"},{"type":"null"}]},"completion_tokens":{"anyOf":[{"type":"integer"},{"type":"null"}]},"tokens":{"anyOf":[{"type":"integer"},{"type":"null"}]},"caller_functionname":{"description":"This metric is deprecated"},"caller_filename":{"description":"This metric is deprecated"},"caller_lineno":{"description":"This metric is deprecated"}},"additionalProperties":{"type":"number"}},{"type":"null"}]},"context":{"anyOf":[{"type":"object","properties":{"caller_functionname":{"description":"The function in code which created the project logs event","type":["string","null"]},"caller_filename":{"description":"Name of the file in code where the project logs event was created","type":["string","null"]},"caller_lineno":{"anyOf":[{"type":"integer"},{"type":"null"}]}},"additionalProperties":{}},{"type":"null"}]},"span_id":{"type":"string","description":"A unique identifier used to link different project logs events together as part of a full trace. See the [tracing guide](https://www.braintrust.dev/docs/instrument) for full details on tracing"},"span_parents":{"anyOf":[{"type":"array","items":{"type":"string"}},{"type":"null"}]},"root_span_id":{"type":"string","description":"A unique identifier for the trace this project logs event belongs to"},"is_root":{"type":["boolean","null"],"description":"Whether this span is a root span"},"span_attributes":{"anyOf":[{"type":"object","properties":{"name":{"description":"Name of the span, for display purposes only","type":["string","null"]},"type":{"anyOf":[{"enum":["llm","score","function","eval","task","tool","automation","facet","preprocessor","classifier","review"],"type":"string"},{"type":"null"}]},"purpose":{"anyOf":[{"enum":["scorer"],"type":"string"},{"type":"null"}]}},"additionalProperties":{},"description":"Human-identifying attributes of the span, such as name, type, etc."},{"type":"null"}]},"origin":{"anyOf":[{"type":"object","properties":{"object_type":{"description":"Type of the object the event is originating from.","enum":["project_logs","experiment","dataset","prompt","function","prompt_session"],"type":"string"},"object_id":{"description":"ID of the object the event is originating from.","type":"string","format":"uuid"},"id":{"description":"ID of the original event.","type":"string"},"_xact_id":{"description":"Transaction ID of the original event.","type":["string","null"]},"created":{"description":"Created timestamp of the original event. Used to help sort in the UI","type":["string","null"]}},"required":["object_type","object_id","id"],"description":"Reference to the original object and event this was copied from."},{"type":"null"}]},"comments":{"anyOf":[{"type":"array","items":{}},{"type":"null"}]},"audit_data":{"anyOf":[{"type":"array","items":{}},{"type":"null"}]},"_async_scoring_state":{},"facets":{"anyOf":[{"type":"object","additionalProperties":{},"properties":{}},{"type":"null"}]},"classifications":{"anyOf":[{"type":"object","additionalProperties":{"type":"array","items":{"type":"object","properties":{"id":{"type":"string","description":"Stable classification identifier"},"label":{"type":"string","description":"Original label of the classification item, which is useful for search and indexing purposes"},"confidence":{"type":["number","null"],"description":"Optional confidence score for the classification"},"metadata":{"anyOf":[{"type":"object","additionalProperties":{}},{"type":"null"}],"description":"Optional metadata associated with the classification"},"source":{"anyOf":[{"anyOf":[{"type":"object","properties":{"type":{"type":"string","const":"function"},"id":{"type":"string"},"version":{"type":"string","description":"The version of the function"}},"required":["type","id"],"additionalProperties":false},{"type":"object","properties":{"type":{"type":"string","const":"global"},"name":{"type":"string"},"function_type":{"type":"string","enum":["llm","scorer","task","tool","custom_view","preprocessor","facet","classifier","tag","parameters","sandbox"],"default":"scorer","description":"The type of global function. Defaults to 'scorer'."}},"required":["type","name"],"additionalProperties":false}]},{"type":"null"}],"description":"Optional function identifier that produced the classification"}},"required":["id"],"additionalProperties":false}},"properties":{}},{"type":"null"}]}}}},"realtime_state":{"type":"on","minimum_xact_id":"1000196963363376981","read_bytes":0,"actual_xact_id":"1000196963363376981"},"freshness_state":{"last_processed_xact_id":"1000196963363376981","last_considered_xact_id":"1000196963363376981"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/otel_v1_traces-f94211b9-c1a4-46d4-bef3-b30760ea3a5d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/otel_v1_traces-dd1e558d-523c-4189-bfd0-d1808c9a7233.json
similarity index 60%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/otel_v1_traces-f94211b9-c1a4-46d4-bef3-b30760ea3a5d.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/otel_v1_traces-dd1e558d-523c-4189-bfd0-d1808c9a7233.json
index e54cf54e..329c4d06 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/otel_v1_traces-f94211b9-c1a4-46d4-bef3-b30760ea3a5d.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/otel_v1_traces-dd1e558d-523c-4189-bfd0-d1808c9a7233.json
@@ -1 +1 @@
-{"Code":"ForbiddenError","Message":"Missing read access to experiment id abc123-http-test, or the experiment does not exist [user_email=andrew@braintrustdata.com] [user_org=braintrustdata.com] [timestamp=1771391464.278]","InternalTraceId":"699549e8000000005de7de1125c2fb42","Path":"/otel/v1/traces","Service":"api"}
\ No newline at end of file
+{"Code":"ForbiddenError","Message":"Missing read access to experiment id abc123-http-test, or the experiment does not exist [user_email=andrew@braintrustdata.com] [user_org=braintrustdata.com] [timestamp=1775682178.832]","InternalTraceId":"69d6c282000000005868ea9bb6bc3400","Path":"/otel/v1/traces","Service":"api"}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset-4aee3b04-16ec-41e1-b008-e824d594ac7a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset-36b6fd87-82a6-4dd2-b0b1-648041a594ce.json
similarity index 65%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset-4aee3b04-16ec-41e1-b008-e824d594ac7a.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset-36b6fd87-82a6-4dd2-b0b1-648041a594ce.json
index 97d2c159..0f5d72e5 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset-4aee3b04-16ec-41e1-b008-e824d594ac7a.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset-36b6fd87-82a6-4dd2-b0b1-648041a594ce.json
@@ -1 +1 @@
-{"objects":[{"id":"0855b29c-69ba-4f98-9154-61a40334a492","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"food","description":null,"created":"2026-01-23T01:46:35.324Z","deleted_at":null,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"url_slug":"food"}]}
\ No newline at end of file
+{"objects":[{"id":"0855b29c-69ba-4f98-9154-61a40334a492","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"food","description":null,"created":"2026-01-23T01:46:35.324Z","deleted_at":null,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","tags":null,"metadata":null,"url_slug":"food"}]}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-b73618be-c744-4247-8712-14ede41ce09d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-c6714654-d22e-4f3a-8e88-899791466902.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-b73618be-c744-4247-8712-14ede41ce09d.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-c6714654-d22e-4f3a-8e88-899791466902.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-99de4385-409a-45c7-865d-a1b1f36e2aca.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-fc18a4bd-c916-44d4-b57c-07cd0de0b62e.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-99de4385-409a-45c7-865d-a1b1f36e2aca.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-fc18a4bd-c916-44d4-b57c-07cd0de0b62e.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-62de2627-770d-4a6d-96ca-c4c648f718cc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-0d4dc344-768e-488a-8d8e-984f8cbe702f.json
similarity index 60%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-62de2627-770d-4a6d-96ca-c4c648f718cc.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-0d4dc344-768e-488a-8d8e-984f8cbe702f.json
index 6ff09e5b..00193b77 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-62de2627-770d-4a6d-96ca-c4c648f718cc.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-0d4dc344-768e-488a-8d8e-984f8cbe702f.json
@@ -1 +1 @@
-{"id":"2b74c6f0-cb9a-4ddd-a30e-97aaecfded98","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval","description":null,"created":"2026-02-04T18:34:20.768Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null}
\ No newline at end of file
+{"id":"2b74c6f0-cb9a-4ddd-a30e-97aaecfded98","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval","description":null,"created":"2026-02-04T18:34:20.768Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-7e9c701b-c166-4826-b68e-657961e72cb3.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-3489b79c-cf53-4698-a449-61c14e2f24a7.json
similarity index 60%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-7e9c701b-c166-4826-b68e-657961e72cb3.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-3489b79c-cf53-4698-a449-61c14e2f24a7.json
index 6ff09e5b..00193b77 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-7e9c701b-c166-4826-b68e-657961e72cb3.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-3489b79c-cf53-4698-a449-61c14e2f24a7.json
@@ -1 +1 @@
-{"id":"2b74c6f0-cb9a-4ddd-a30e-97aaecfded98","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval","description":null,"created":"2026-02-04T18:34:20.768Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null}
\ No newline at end of file
+{"id":"2b74c6f0-cb9a-4ddd-a30e-97aaecfded98","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval","description":null,"created":"2026-02-04T18:34:20.768Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-3d79a0de-77c8-4db4-b7e1-03b0e6680d58.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-3d79a0de-77c8-4db4-b7e1-03b0e6680d58.json
new file mode 100644
index 00000000..76d5a645
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-3d79a0de-77c8-4db4-b7e1-03b0e6680d58.json
@@ -0,0 +1 @@
+{"objects":[{"id":"9e9e6bb6-381f-48c0-b040-c02526230e83","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"test-dataset-linking","description":null,"created":"2026-02-18T04:28:14.318Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":"0855b29c-69ba-4f98-9154-61a40334a492","dataset_version":"1000196534141277158","parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"83d4ee8a-34ac-432c-96fb-14e985cc67b0","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-task-error","description":null,"created":"2026-02-18T02:13:48.226Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"2e121b50-e095-499a-9f28-5a7a3f9040c0","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-scorer-error","description":null,"created":"2026-02-18T02:13:45.952Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"003f29ce-845b-4987-a072-1aa37e2afd44","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-experiment-tags-metadata","description":null,"created":"2026-02-11T02:26:46.297Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":{"model":"gpt-4o","version":"1.0"},"tags":["java-sdk","unit-test"]},{"id":"2b74c6f0-cb9a-4ddd-a30e-97aaecfded98","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval","description":null,"created":"2026-02-04T18:34:20.768Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"37ac3f3f-00b9-4a5f-9977-faf1349ab881","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-origin","description":null,"created":"2026-02-04T18:34:16.190Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"f8550f07-ddf5-40aa-94e9-cf158c04ae3f","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-tags-metadata","description":null,"created":"2026-02-04T18:34:11.241Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"5c4ac6c7-1850-4b67-895e-debedb9976c9","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"java-eval-x-1769211173378","description":null,"created":"2026-01-23T23:32:56.642Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null}]}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-74a75de0-531d-43a7-bfe5-5f533d8a2a09.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-5a5c5081-d4f9-4975-a2ca-bc2d6467c5d6.json
similarity index 51%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-74a75de0-531d-43a7-bfe5-5f533d8a2a09.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-5a5c5081-d4f9-4975-a2ca-bc2d6467c5d6.json
index 4e086a2f..1cf64f6d 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-74a75de0-531d-43a7-bfe5-5f533d8a2a09.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-5a5c5081-d4f9-4975-a2ca-bc2d6467c5d6.json
@@ -1 +1 @@
-{"id":"003f29ce-845b-4987-a072-1aa37e2afd44","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-experiment-tags-metadata","description":null,"created":"2026-02-11T02:26:46.297Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":{"model":"gpt-4o","version":"1.0"},"tags":["java-sdk","unit-test"]}
\ No newline at end of file
+{"id":"003f29ce-845b-4987-a072-1aa37e2afd44","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-experiment-tags-metadata","description":null,"created":"2026-02-11T02:26:46.297Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"parameters_id":null,"parameters_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":{"model":"gpt-4o","version":"1.0"},"tags":["java-sdk","unit-test"]}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-455cbba4-4244-4c25-9616-59130c35a283.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-7fdbefe4-4e4a-4ea8-bc20-51bc293ff35d.json
similarity index 66%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-455cbba4-4244-4c25-9616-59130c35a283.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-7fdbefe4-4e4a-4ea8-bc20-51bc293ff35d.json
index 779347bf..2dc29681 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-455cbba4-4244-4c25-9616-59130c35a283.json
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\ No newline at end of file
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-8223cfb6-9cc9-4001-8faf-6a6b9ea160f4.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-8223cfb6-9cc9-4001-8faf-6a6b9ea160f4.json
new file mode 100644
index 00000000..76d5a645
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-96ade604-616d-4a87-89bd-9e80bfa8289a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-866ca888-2c28-44a5-9240-b271f53156dd.json
similarity index 58%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-96ade604-616d-4a87-89bd-9e80bfa8289a.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-866ca888-2c28-44a5-9240-b271f53156dd.json
index ffa4d9a0..27337862 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-96ade604-616d-4a87-89bd-9e80bfa8289a.json
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\ No newline at end of file
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-aaebb417-cb28-4635-b9ec-607b01ef7444.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-aaebb417-cb28-4635-b9ec-607b01ef7444.json
new file mode 100644
index 00000000..00193b77
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-b156ce48-ea1e-4e3b-98f2-6d0aaca174d9.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-b156ce48-ea1e-4e3b-98f2-6d0aaca174d9.json
deleted file mode 100644
index fa1f3ee3..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-b156ce48-ea1e-4e3b-98f2-6d0aaca174d9.json
+++ /dev/null
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-ab7bee5a-cc73-4df5-980a-31bc1a90e927.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-c0e92a2b-4511-4d57-8e44-492c6b21d9fb.json
similarity index 58%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-ab7bee5a-cc73-4df5-980a-31bc1a90e927.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-c0e92a2b-4511-4d57-8e44-492c6b21d9fb.json
index 46bbb7da..f10df9c9 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-ab7bee5a-cc73-4df5-980a-31bc1a90e927.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-c0e92a2b-4511-4d57-8e44-492c6b21d9fb.json
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-361b5793-900f-4546-9eb3-b7581448c646.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-cd3b3837-48ba-4422-82d2-97ef99ebd6ac.json
similarity index 59%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-361b5793-900f-4546-9eb3-b7581448c646.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-cd3b3837-48ba-4422-82d2-97ef99ebd6ac.json
index 565dc2c9..de7f015b 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-361b5793-900f-4546-9eb3-b7581448c646.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-cd3b3837-48ba-4422-82d2-97ef99ebd6ac.json
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-cefc7372-b3a8-4a99-9fe6-fa03fa4b01e3.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-e6327407-0d30-4c27-9fdf-2128b5581701.json
similarity index 58%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-cefc7372-b3a8-4a99-9fe6-fa03fa4b01e3.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-e6327407-0d30-4c27-9fdf-2128b5581701.json
index 3d7de997..2ceb8cc3 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-cefc7372-b3a8-4a99-9fe6-fa03fa4b01e3.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-e6327407-0d30-4c27-9fdf-2128b5581701.json
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-f6379a73-7bce-4cf9-96aa-1e47a85705e9.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-f6379a73-7bce-4cf9-96aa-1e47a85705e9.json
deleted file mode 100644
index fa1f3ee3..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_experiment-f6379a73-7bce-4cf9-96aa-1e47a85705e9.json
+++ /dev/null
@@ -1 +0,0 @@
-{"objects":[{"id":"9e9e6bb6-381f-48c0-b040-c02526230e83","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"test-dataset-linking","description":null,"created":"2026-02-18T04:28:14.318Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":"0855b29c-69ba-4f98-9154-61a40334a492","dataset_version":"1000196534141277158","public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"83d4ee8a-34ac-432c-96fb-14e985cc67b0","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-task-error","description":null,"created":"2026-02-18T02:13:48.226Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"2e121b50-e095-499a-9f28-5a7a3f9040c0","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-scorer-error","description":null,"created":"2026-02-18T02:13:45.952Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"003f29ce-845b-4987-a072-1aa37e2afd44","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-experiment-tags-metadata","description":null,"created":"2026-02-11T02:26:46.297Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":{"model":"gpt-4o","version":"1.0"},"tags":["java-sdk","unit-test"]},{"id":"2b74c6f0-cb9a-4ddd-a30e-97aaecfded98","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval","description":null,"created":"2026-02-04T18:34:20.768Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"37ac3f3f-00b9-4a5f-9977-faf1349ab881","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-origin","description":null,"created":"2026-02-04T18:34:16.190Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"f8550f07-ddf5-40aa-94e9-cf158c04ae3f","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"unit-test-eval-tags-metadata","description":null,"created":"2026-02-04T18:34:11.241Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null},{"id":"5c4ac6c7-1850-4b67-895e-debedb9976c9","project_id":"6ae68365-7620-4630-921b-bac416634fc8","name":"java-eval-x-1769211173378","description":null,"created":"2026-01-23T23:32:56.642Z","repo_info":null,"commit":null,"base_exp_id":null,"deleted_at":null,"dataset_id":null,"dataset_version":null,"public":false,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","metadata":null,"tags":null}]}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-af89083b-16ea-4f01-942a-949b9c98238b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-028d85c8-054b-4d4d-ab6d-aad6244a4452.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-af89083b-16ea-4f01-942a-949b9c98238b.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-028d85c8-054b-4d4d-ab6d-aad6244a4452.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-b038ee21-c968-48d1-bb22-0bbc4ca15f02.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-4fa523fc-d1d8-4510-927c-6b4b2ba30e14.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-b038ee21-c968-48d1-bb22-0bbc4ca15f02.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-4fa523fc-d1d8-4510-927c-6b4b2ba30e14.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-f3575367-9fa6-4747-a2d0-b78c4511a93c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-91ab301a-75af-4652-9299-9378bacb06b8.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-f3575367-9fa6-4747-a2d0-b78c4511a93c.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-91ab301a-75af-4652-9299-9378bacb06b8.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-a316701b-03a4-4d2b-8dc9-8f4659835637.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-c087c5c6-563e-48a9-8196-ab4a68f43908.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-a316701b-03a4-4d2b-8dc9-8f4659835637.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-c087c5c6-563e-48a9-8196-ab4a68f43908.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-e3222bb0-ef62-44af-bdf0-d719e2afc47c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-cf058665-dcbe-446c-af0e-cf70e29aba8c.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-e3222bb0-ef62-44af-bdf0-d719e2afc47c.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function-cf058665-dcbe-446c-af0e-cf70e29aba8c.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-c5646793-e06f-4331-8cfe-a868c55a8541.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-5d8f9b94-4a59-46b7-8013-1bc5ceb1ddb6.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-c5646793-e06f-4331-8cfe-a868c55a8541.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-5d8f9b94-4a59-46b7-8013-1bc5ceb1ddb6.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-e418ae28-045a-460d-8a0d-77b04c0516cb.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-8e6b1644-a5b0-4fbd-99c7-1f217bdff0e8.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-e418ae28-045a-460d-8a0d-77b04c0516cb.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-8e6b1644-a5b0-4fbd-99c7-1f217bdff0e8.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-3387b4d6-99fa-42bf-be42-0599b09b01b7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-3387b4d6-99fa-42bf-be42-0599b09b01b7.json
new file mode 100644
index 00000000..db1b0554
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-3387b4d6-99fa-42bf-be42-0599b09b01b7.json
@@ -0,0 +1 @@
+{"name":"close-enough-judge","score":null,"metadata":{"rationale":"1) Identify inputs: actual output = \"four\" (word form), expected = \"4\" (digit form).\n2) Determine equivalence: Both represent the same integer value (4). This is semantic equivalence.\n3) Consider typical evaluation rules: If scorer compares normalized numeric values or uses semantic matching, they are equivalent -> full match. If scorer uses strict string equality without normalization, they differ.\n4) Because the question asks \"how closely\" they match, and semantic equivalence is usually what's intended in evals, the appropriate score is maximum (1.0).","choice":"1.0"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-4adbe73e-d342-4368-9aad-2b269068d505.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-4adbe73e-d342-4368-9aad-2b269068d505.json
new file mode 100644
index 00000000..ea17f5ae
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-4adbe73e-d342-4368-9aad-2b269068d505.json
@@ -0,0 +1 @@
+{"name":"close-enough-judge","score":null,"metadata":{"rationale":"1) Identify expected result: 'hello world'. 2) Identify actual output: 'hello world'. 3) Compare length: both have 11 characters including the space. 4) Compare characters position-by-position: 'h'=='h', 'e'=='e', 'l'=='l', 'l'=='l', 'o'=='o', ' '==' ', 'w'=='w', 'o'=='o', 'r'=='r', 'l'=='l', 'd'=='d'. 5) Compare case sensitivity: both lowercase. 6) Compare whitespace and punctuation: both have a single space between words, no trailing or leading whitespace shown. 7) Conclusion: exact match with no differences observed.","choice":"1.0"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-54bf895e-498a-4e29-9810-1b198760020a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-54bf895e-498a-4e29-9810-1b198760020a.json
deleted file mode 100644
index 8240352f..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-54bf895e-498a-4e29-9810-1b198760020a.json
+++ /dev/null
@@ -1 +0,0 @@
-{"name":"close-enough-judge","score":null,"metadata":{"rationale":"1) Identify the actual output: \"hello world\".\n2) Identify the expected output: \"hello world\".\n3) Compare them character-by-character, including case and whitespace.\n4) No differences found: characters, case, and spacing are identical.\n5) For an exact-match scoring scale from 0.0 to 1.0, identical outputs map to 1.0.\n\nConclusion: exact match, score 1.0.","choice":"1.0"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-cb9a8550-fa8c-4384-a679-ec28ecc7fd21.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-cb9a8550-fa8c-4384-a679-ec28ecc7fd21.json
deleted file mode 100644
index 75c22882..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-cb9a8550-fa8c-4384-a679-ec28ecc7fd21.json
+++ /dev/null
@@ -1 +0,0 @@
-{"name":"close-enough-judge","score":null,"metadata":{"rationale":"1) Identify semantic meaning: the token 'four' is the English word representing the integer 4.\n2) Compare to expected: '4' is the numeric digit for the same integer.\n3) Normalization: Under common evaluation normalization (case-insensitive, number-word normalization), these are equivalent.\n4) Edge cases: If the grader requires exact string match without normalization, they'd be considered different; but typical semantic scoring treats them equal.\n5) Conclusion: semantically identical in standard evaluations, so full score is appropriate.","choice":"1.0"}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-2106a261-c3f7-443b-8f5c-ed13448269f3.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-0560a728-b9ca-47db-982a-139b73668d45.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-2106a261-c3f7-443b-8f5c-ed13448269f3.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-0560a728-b9ca-47db-982a-139b73668d45.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-a554af91-439a-463c-ab8f-062c2ffb8966.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-30cca87d-dff0-433a-85dd-a1a5efde41ce.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-a554af91-439a-463c-ab8f-062c2ffb8966.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-30cca87d-dff0-433a-85dd-a1a5efde41ce.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-b45e1553-51d9-4042-a329-9bf1af4051db.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-70e8cefe-455c-473b-b3bc-03378456f899.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-b45e1553-51d9-4042-a329-9bf1af4051db.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-70e8cefe-455c-473b-b3bc-03378456f899.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-cdf9cefb-6fee-4cf9-ab41-01838207d25d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-bff98de5-1dbc-48b2-ad9a-1985e8dc6107.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-cdf9cefb-6fee-4cf9-ab41-01838207d25d.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f-bff98de5-1dbc-48b2-ad9a-1985e8dc6107.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-3c7b91b0-9c77-4f69-95e5-46b6b813e494.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-49895de4-03c7-4fdc-850e-b49d6e3f8a72.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-3c7b91b0-9c77-4f69-95e5-46b6b813e494.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-49895de4-03c7-4fdc-850e-b49d6e3f8a72.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-8e5d7f5e-2ad9-4178-9806-6532dc588f57.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-56eb6751-958b-43ef-a244-a36c39bee0c6.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-8e5d7f5e-2ad9-4178-9806-6532dc588f57.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-56eb6751-958b-43ef-a244-a36c39bee0c6.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b6e869f8-71a5-4013-8c2f-fa5fea4cfa03.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b80137f6-7734-4f0c-ba03-d71c58fcf51d.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b6e869f8-71a5-4013-8c2f-fa5fea4cfa03.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b80137f6-7734-4f0c-ba03-d71c58fcf51d.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-e4059ae2-e33d-4880-ac31-856c18b881a7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-cc7074b5-36dc-4b63-b3b0-50ff9f6e2720.json
similarity index 100%
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-e1b0baf4-e618-42ec-bb1d-7b08f001fbb7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-88566aef-1a8c-4929-bffc-edcf08b3a98a.json
similarity index 100%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-e1b0baf4-e618-42ec-bb1d-7b08f001fbb7.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-88566aef-1a8c-4929-bffc-edcf08b3a98a.json
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-9969f5b2-54fe-4b5c-a9e1-850c38683536.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-9969f5b2-54fe-4b5c-a9e1-850c38683536.json
new file mode 100644
index 00000000..f2e7801e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-9969f5b2-54fe-4b5c-a9e1-850c38683536.json
@@ -0,0 +1 @@
+{"id":"6ae68365-7620-4630-921b-bac416634fc8","org_id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","name":"java-unit-test","description":null,"created":"2026-01-21T01:32:52.137Z","deleted_at":null,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","settings":{"remote_eval_sources":[{"url":"http://localhost:8301","name":"java-devserver","description":null}]}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-badf1ce3-a4b1-4947-94e7-1dffbc71686c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-badf1ce3-a4b1-4947-94e7-1dffbc71686c.json
new file mode 100644
index 00000000..f2e7801e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-badf1ce3-a4b1-4947-94e7-1dffbc71686c.json
@@ -0,0 +1 @@
+{"id":"6ae68365-7620-4630-921b-bac416634fc8","org_id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","name":"java-unit-test","description":null,"created":"2026-01-21T01:32:52.137Z","deleted_at":null,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","settings":{"remote_eval_sources":[{"url":"http://localhost:8301","name":"java-devserver","description":null}]}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-c877c616-045a-4b80-8e96-5b03e23dcd8c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-c877c616-045a-4b80-8e96-5b03e23dcd8c.json
new file mode 100644
index 00000000..f2e7801e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-c877c616-045a-4b80-8e96-5b03e23dcd8c.json
@@ -0,0 +1 @@
+{"id":"6ae68365-7620-4630-921b-bac416634fc8","org_id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","name":"java-unit-test","description":null,"created":"2026-01-21T01:32:52.137Z","deleted_at":null,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","settings":{"remote_eval_sources":[{"url":"http://localhost:8301","name":"java-devserver","description":null}]}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-ee912781-620b-4249-915d-f585dbdb3cd7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-ee912781-620b-4249-915d-f585dbdb3cd7.json
new file mode 100644
index 00000000..f2e7801e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-ee912781-620b-4249-915d-f585dbdb3cd7.json
@@ -0,0 +1 @@
+{"id":"6ae68365-7620-4630-921b-bac416634fc8","org_id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","name":"java-unit-test","description":null,"created":"2026-01-21T01:32:52.137Z","deleted_at":null,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","settings":{"remote_eval_sources":[{"url":"http://localhost:8301","name":"java-devserver","description":null}]}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-fb217604-cc13-4af6-a046-cf0fea4577e1.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-fb217604-cc13-4af6-a046-cf0fea4577e1.json
new file mode 100644
index 00000000..f2e7801e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/__files/v1_project_6ae68365-7620-4630-921b-bac416634fc8-fb217604-cc13-4af6-a046-cf0fea4577e1.json
@@ -0,0 +1 @@
+{"id":"6ae68365-7620-4630-921b-bac416634fc8","org_id":"5d7c97d7-fef1-4cb7-bda6-7e3756a0ca8e","name":"java-unit-test","description":null,"created":"2026-01-21T01:32:52.137Z","deleted_at":null,"user_id":"a5ca7f9c-bf20-40c4-a82b-5c992f6a38f5","settings":{"remote_eval_sources":[{"url":"http://localhost:8301","name":"java-devserver","description":null}]}}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-05a54346-5fc6-4824-ae59-a6c4331a1b76.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-05a54346-5fc6-4824-ae59-a6c4331a1b76.json
new file mode 100644
index 00000000..f4895b5c
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-05a54346-5fc6-4824-ae59-a6c4331a1b76.json
@@ -0,0 +1,34 @@
+{
+  "id" : "05a54346-5fc6-4824-ae59-a6c4331a1b76",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-05a54346-5fc6-4824-ae59-a6c4331a1b76.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNT-EZ1IAMEu9A=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c27f-2116fa6b1f2b0363670d3280;Parent=73cee7e5427388ae;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:55 GMT",
+      "Via" : "1.1 5d1052cca98b3bf996fd05529bc2e070.cloudfront.net (CloudFront), 1.1 ee5f8da78d4211a93c9dba8864a4067e.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c27f00000000566773eeefc1da48",
+      "x-amzn-RequestId" : "410c317a-f7af-4c6e-929d-4c2a3907458d",
+      "X-Amz-Cf-Id" : "UuHvqftxcyUXPL3GhYTxGZoZ3eVwYjQE2ywhyvau3JjjYDXFRq66uQ==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "05a54346-5fc6-4824-ae59-a6c4331a1b76",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-24",
+  "insertionIndex" : 6
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-05c78836-4d00-4e98-b2bc-9cc63b7c4fdc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-05c78836-4d00-4e98-b2bc-9cc63b7c4fdc.json
new file mode 100644
index 00000000..4af4455e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-05c78836-4d00-4e98-b2bc-9cc63b7c4fdc.json
@@ -0,0 +1,35 @@
+{
+  "id" : "05c78836-4d00-4e98-b2bc-9cc63b7c4fdc",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-05c78836-4d00-4e98-b2bc-9cc63b7c4fdc.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNNmFfxoAMEVaQ=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c256-491c525742fe0b48068dc770;Parent=2cebc6d256bf763b;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:14 GMT",
+      "Via" : "1.1 8e6c2cf5874f5e4093136cc3de4d856a.cloudfront.net (CloudFront), 1.1 ddea1c07643e5e0bfceb34480eebdc52.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c256000000003ce9e8db09a135f1",
+      "x-amzn-RequestId" : "0dc5a02d-8671-46dd-94a6-4ddbd234ded9",
+      "X-Amz-Cf-Id" : "Hao1daFkBWAaWfZnZU0yGxGDSbNQ74QCLBQyiB7AJLCcKQHOjif0Iw==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "05c78836-4d00-4e98-b2bc-9cc63b7c4fdc",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-3",
+  "newScenarioState" : "scenario-1-api-apikey-login-4",
+  "insertionIndex" : 102
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-0b560d16-f935-4fd2-9e5f-f6239759ee86.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-0b560d16-f935-4fd2-9e5f-f6239759ee86.json
new file mode 100644
index 00000000..b3d570d9
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-0b560d16-f935-4fd2-9e5f-f6239759ee86.json
@@ -0,0 +1,35 @@
+{
+  "id" : "0b560d16-f935-4fd2-9e5f-f6239759ee86",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-0b560d16-f935-4fd2-9e5f-f6239759ee86.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNRPHI3oAMEiPg=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c26d-0be930ae38576fd320c31e64;Parent=4dabe57a28c3eb8d;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:38 GMT",
+      "Via" : "1.1 d08613e1dd8ad614e47875ae31a8af20.cloudfront.net (CloudFront), 1.1 e6b2537b87653726af8a79e6da505188.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26d0000000037a7011e0fbeb1e2",
+      "x-amzn-RequestId" : "51507b6a-ce25-430e-bfb1-09d8afc3fc0c",
+      "X-Amz-Cf-Id" : "QG2U-8wU3tbcxF6f3LzRkAInbc0ftziNGsYPIj_KGy0JWNw64MEDvQ==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "0b560d16-f935-4fd2-9e5f-f6239759ee86",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-16",
+  "newScenarioState" : "scenario-1-api-apikey-login-17",
+  "insertionIndex" : 48
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-0e542fd4-db95-465c-9a35-d74a74d8228d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-0e542fd4-db95-465c-9a35-d74a74d8228d.json
new file mode 100644
index 00000000..c1086d2e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-0e542fd4-db95-465c-9a35-d74a74d8228d.json
@@ -0,0 +1,35 @@
+{
+  "id" : "0e542fd4-db95-465c-9a35-d74a74d8228d",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-0e542fd4-db95-465c-9a35-d74a74d8228d.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNR2GZMoAMEQkg=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c271-59783ed86fb0003a3a919dc7;Parent=00aad267726fdc52;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:41 GMT",
+      "Via" : "1.1 2be627c4e85d6d9d9e32a7523e1b67ee.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c271000000004eed53cf1616e2de",
+      "x-amzn-RequestId" : "05917290-a15b-4cf5-8221-cf61ef4a7cc0",
+      "X-Amz-Cf-Id" : "kswIxzR_0EY0Av1XgpqOZ9o5VtUk9rH0HkARKv7HeVIjb0h0761TTQ==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "0e542fd4-db95-465c-9a35-d74a74d8228d",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-18",
+  "newScenarioState" : "scenario-1-api-apikey-login-19",
+  "insertionIndex" : 39
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-16182011-e6cf-45cc-9e12-9ad6d27a2aec.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-16182011-e6cf-45cc-9e12-9ad6d27a2aec.json
deleted file mode 100644
index a260db5d..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-16182011-e6cf-45cc-9e12-9ad6d27a2aec.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "16182011-e6cf-45cc-9e12-9ad6d27a2aec",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-16182011-e6cf-45cc-9e12-9ad6d27a2aec.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:13 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "24825b85-a699-4326-b38f-68eba209460d",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549b500000000444210a3e5eb4503",
-      "x-amz-apigw-id" : "Y9h0eFPVIAMEg6w=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549b5-00257e4c62cfa21734c31bf5;Parent=78f601995fbc264c;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 5e599a9eda8861379cfef6a522da18e4.cloudfront.net (CloudFront), 1.1 e6b2537b87653726af8a79e6da505188.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "V6C9r9OEmsapms4X0MdcL0GkQVwdnvUtwiO8Jvx3FwugEyQr-HUKFw=="
-    }
-  },
-  "uuid" : "16182011-e6cf-45cc-9e12-9ad6d27a2aec",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-7",
-  "newScenarioState" : "scenario-2-api-apikey-login-8",
-  "insertionIndex" : 22
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-16710250-694c-40ac-8a16-30991db4c3ab.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-16710250-694c-40ac-8a16-30991db4c3ab.json
new file mode 100644
index 00000000..a4567cd8
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-16710250-694c-40ac-8a16-30991db4c3ab.json
@@ -0,0 +1,35 @@
+{
+  "id" : "16710250-694c-40ac-8a16-30991db4c3ab",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-16710250-694c-40ac-8a16-30991db4c3ab.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNNAHB9oAMEBhw=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c252-23ae3cd60fad4f3841c7f8d9;Parent=4276d700045e6370;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:10 GMT",
+      "Via" : "1.1 49e28fce48b0172be48e0ceea533547e.cloudfront.net (CloudFront), 1.1 7605973575a3551426b82751020317de.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c252000000005b97b3b0ab6d2998",
+      "x-amzn-RequestId" : "9b3e9c23-3008-4455-9fb1-d4edacd03735",
+      "X-Amz-Cf-Id" : "z9QJtJNZtRZZzM0I3HQ7ZXgvb7eLf86Ag2oRN4HzD-pyuUmhBz1B1g==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "16710250-694c-40ac-8a16-30991db4c3ab",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "Started",
+  "newScenarioState" : "scenario-1-api-apikey-login-2",
+  "insertionIndex" : 105
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-1f7970aa-2c29-4da1-9bce-070eb04c5cc0.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-1f7970aa-2c29-4da1-9bce-070eb04c5cc0.json
deleted file mode 100644
index f83de9dd..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-1f7970aa-2c29-4da1-9bce-070eb04c5cc0.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "1f7970aa-2c29-4da1-9bce-070eb04c5cc0",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-1f7970aa-2c29-4da1-9bce-070eb04c5cc0.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:24 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "48804275-d1b2-47f2-815f-f34600f525ff",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549c0000000000e5bb9924b77bc1d",
-      "x-amz-apigw-id" : "Y9h2EE7DoAMEMWQ=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549c0-30187e127465d05f3edae683;Parent=2e9acc302e171a43;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 b47176981720d8607d309e56e9510316.cloudfront.net (CloudFront), 1.1 dbfd9bcc806d4c322e72b461b2458112.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "M0cH0XtL4fjgwGlWGyA7bDLZ30GJxPE0FWIBBjPd5BM6IgbzvrRaSQ=="
-    }
-  },
-  "uuid" : "1f7970aa-2c29-4da1-9bce-070eb04c5cc0",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-12",
-  "newScenarioState" : "scenario-2-api-apikey-login-13",
-  "insertionIndex" : 47
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-22b6e58b-f36b-4e8d-8c95-9ee34ec5ed70.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-22b6e58b-f36b-4e8d-8c95-9ee34ec5ed70.json
new file mode 100644
index 00000000..7dc165ae
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-22b6e58b-f36b-4e8d-8c95-9ee34ec5ed70.json
@@ -0,0 +1,35 @@
+{
+  "id" : "22b6e58b-f36b-4e8d-8c95-9ee34ec5ed70",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-22b6e58b-f36b-4e8d-8c95-9ee34ec5ed70.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNPXEquIAMEaXA=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c261-156d05b0441b83bf23100469;Parent=33b636d658ef8856;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:26 GMT",
+      "Via" : "1.1 724581b48d733e53834b535d2a623034.cloudfront.net (CloudFront), 1.1 ddea1c07643e5e0bfceb34480eebdc52.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2620000000008ff1e659f397686",
+      "x-amzn-RequestId" : "39640a69-c90a-43ba-9697-1a1dc53ced6e",
+      "X-Amz-Cf-Id" : "1ePiMzU0k350X_8v8AafRSG412c0ACqcnXJ_ff47TknkTqrH50HDgw==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "22b6e58b-f36b-4e8d-8c95-9ee34ec5ed70",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-10",
+  "newScenarioState" : "scenario-1-api-apikey-login-11",
+  "insertionIndex" : 78
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-27af48ee-9e48-46e3-a72a-505220cc4fde.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-27af48ee-9e48-46e3-a72a-505220cc4fde.json
deleted file mode 100644
index b7f5eabb..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-27af48ee-9e48-46e3-a72a-505220cc4fde.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "27af48ee-9e48-46e3-a72a-505220cc4fde",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-27af48ee-9e48-46e3-a72a-505220cc4fde.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:15 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "c148bb6d-7af3-4fde-a236-58e339b57b87",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549b700000000705e4946f834fbb6",
-      "x-amz-apigw-id" : "Y9h0uFi5oAMEK9A=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549b7-6082ce266fd354a23b4cc734;Parent=08126d4a74d536a1;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 7fcfc911845f681c235b0b3f32f3e1c6.cloudfront.net (CloudFront), 1.1 0eb43913f9caf453beb959a8a836a688.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "YL4M_84nVU7kOqbzohA51imcNnju8TrQ1s2h4f4uxDxyQMw0iBcPVA=="
-    }
-  },
-  "uuid" : "27af48ee-9e48-46e3-a72a-505220cc4fde",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-8",
-  "newScenarioState" : "scenario-2-api-apikey-login-9",
-  "insertionIndex" : 26
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-2bc5505d-8e52-4855-aa71-ec93086486cb.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-2bc5505d-8e52-4855-aa71-ec93086486cb.json
new file mode 100644
index 00000000..f3c705c8
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-2bc5505d-8e52-4855-aa71-ec93086486cb.json
@@ -0,0 +1,35 @@
+{
+  "id" : "2bc5505d-8e52-4855-aa71-ec93086486cb",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-2bc5505d-8e52-4855-aa71-ec93086486cb.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNPrGBFIAMEQ4w=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c263-4ec795ef1d9487d062082d97;Parent=518b26dca1f73b7b;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:28 GMT",
+      "Via" : "1.1 6281593da0ade6742b2f405f2b9ea0ba.cloudfront.net (CloudFront), 1.1 a624be98cd5b264f373d8ac17f78ee50.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2630000000062baf1bf5f92e958",
+      "x-amzn-RequestId" : "1fbbf922-7c59-4f20-8f0e-bb6b155084a3",
+      "X-Amz-Cf-Id" : "-lDT0kFSWUcONJdnGbT859UdMd9J9V_3Mt234yckje-OUVJeSHNoUA==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "2bc5505d-8e52-4855-aa71-ec93086486cb",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-11",
+  "newScenarioState" : "scenario-1-api-apikey-login-12",
+  "insertionIndex" : 74
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-2cbf1159-033a-4577-98cc-eb14679c79f2.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-2cbf1159-033a-4577-98cc-eb14679c79f2.json
deleted file mode 100644
index 9d6894d5..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-2cbf1159-033a-4577-98cc-eb14679c79f2.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "2cbf1159-033a-4577-98cc-eb14679c79f2",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-2cbf1159-033a-4577-98cc-eb14679c79f2.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:33 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "37e93a95-0df5-43fd-9c58-76481ebf20dc",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549c9000000002cd50c618d79113a",
-      "x-amz-apigw-id" : "Y9h3fFQwIAMEVWw=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549c9-676971bb572ff4e96540579c;Parent=3d1f9d8899c6fd65;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 b47176981720d8607d309e56e9510316.cloudfront.net (CloudFront), 1.1 a624be98cd5b264f373d8ac17f78ee50.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "xcY2m212u3icugKDff3soxZF2RP4fp_UjkRIQOEjsgFROcr7YspJtQ=="
-    }
-  },
-  "uuid" : "2cbf1159-033a-4577-98cc-eb14679c79f2",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-16",
-  "newScenarioState" : "scenario-2-api-apikey-login-17",
-  "insertionIndex" : 67
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-3686de1f-c08e-4155-aaed-6f017174252d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-3686de1f-c08e-4155-aaed-6f017174252d.json
deleted file mode 100644
index a226eb57..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-3686de1f-c08e-4155-aaed-6f017174252d.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "3686de1f-c08e-4155-aaed-6f017174252d",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-3686de1f-c08e-4155-aaed-6f017174252d.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:20 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "681853f4-6b06-4966-ae02-1c5cc23b2290",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549bc00000000580670b555672d56",
-      "x-amz-apigw-id" : "Y9h1fGx6IAMEOKw=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549bc-334b430c1b209dd86b147944;Parent=075c414c9bb7fd77;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 2582fcc2e5a8f93a556ac3ef26738abc.cloudfront.net (CloudFront), 1.1 a624be98cd5b264f373d8ac17f78ee50.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "-Fgqaz5QtjhM2R7_GD4x-xba4Noq9xgAM_L-IsCWxpHWsaFfnvi5zQ=="
-    }
-  },
-  "uuid" : "3686de1f-c08e-4155-aaed-6f017174252d",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-10",
-  "newScenarioState" : "scenario-2-api-apikey-login-11",
-  "insertionIndex" : 38
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-3a135720-cda8-46f1-b29e-057d078fdf47.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-3a135720-cda8-46f1-b29e-057d078fdf47.json
deleted file mode 100644
index 99901bfd..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-3a135720-cda8-46f1-b29e-057d078fdf47.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "3a135720-cda8-46f1-b29e-057d078fdf47",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-3a135720-cda8-46f1-b29e-057d078fdf47.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:19 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "ce637441-d29a-4bab-a997-95ab9c28e6c5",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549bb0000000070a26d2903b82a06",
-      "x-amz-apigw-id" : "Y9h1SE7-oAMEvlQ=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549bb-72dabddc497d9a382bc2e4ab;Parent=36e6e01383e38f17;Sampled=0;Lineage=1:24be3d11:0",
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-      "X-Amz-Cf-Id" : "S_r2RzT52piQaMCHdenjM66w6sV02X3WWQE9T0X5-9sCsYCYrgTEOg=="
-    }
-  },
-  "uuid" : "3a135720-cda8-46f1-b29e-057d078fdf47",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-9",
-  "newScenarioState" : "scenario-2-api-apikey-login-10",
-  "insertionIndex" : 35
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-41a2eb56-2db6-4bbc-a5da-a543d30a7d0e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-41a2eb56-2db6-4bbc-a5da-a543d30a7d0e.json
deleted file mode 100644
index 2b86fcf8..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-41a2eb56-2db6-4bbc-a5da-a543d30a7d0e.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "41a2eb56-2db6-4bbc-a5da-a543d30a7d0e",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-41a2eb56-2db6-4bbc-a5da-a543d30a7d0e.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:27 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "8f1245ec-1888-4aa8-8944-1208582f14d0",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549c300000000229cb05af99e3754",
-      "x-amz-apigw-id" : "Y9h2oGpUoAMEsYg=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549c3-1cc26ceb7faaa28142952a94;Parent=23e38271234eb472;Sampled=0;Lineage=1:24be3d11:0",
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-      "X-Amz-Cf-Id" : "44FOciFTnAewpVdFS-gGfJxl_2kMTOglh6wzZ5BeZQJgl_udLcvODA=="
-    }
-  },
-  "uuid" : "41a2eb56-2db6-4bbc-a5da-a543d30a7d0e",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-14",
-  "newScenarioState" : "scenario-2-api-apikey-login-15",
-  "insertionIndex" : 56
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-4618d477-16ee-42e3-977a-760014fcf317.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-4618d477-16ee-42e3-977a-760014fcf317.json
deleted file mode 100644
index edf4a352..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-4618d477-16ee-42e3-977a-760014fcf317.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "4618d477-16ee-42e3-977a-760014fcf317",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-4618d477-16ee-42e3-977a-760014fcf317.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:11 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "fc4ef89a-79cf-4422-9440-9bbcd0fef9bd",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549b30000000049e69bb15662b0a1",
-      "x-amz-apigw-id" : "Y9h0GGL3IAMERew=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549b3-0493c155518537a06f0e15bd;Parent=2b035aa3a658eccc;Sampled=0;Lineage=1:24be3d11:0",
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-      "X-Amz-Cf-Id" : "c9P3atiaSM0oRPBwYHaNHDsb0xPyZdj_lFh6mJF963O4GTSPVBw2Aw=="
-    }
-  },
-  "uuid" : "4618d477-16ee-42e3-977a-760014fcf317",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-5",
-  "newScenarioState" : "scenario-2-api-apikey-login-6",
-  "insertionIndex" : 16
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-484ebdf0-7f2a-4625-b3c9-44430d0e0ccc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-484ebdf0-7f2a-4625-b3c9-44430d0e0ccc.json
deleted file mode 100644
index 009107d8..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-484ebdf0-7f2a-4625-b3c9-44430d0e0ccc.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "484ebdf0-7f2a-4625-b3c9-44430d0e0ccc",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-484ebdf0-7f2a-4625-b3c9-44430d0e0ccc.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:35 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "12670afc-4649-4fb3-8071-011b583b556f",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549cb000000005192f9cafc5ad912",
-      "x-amz-apigw-id" : "Y9h30G1PIAMELPw=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549cb-782ea4852c771f6445a9758a;Parent=57c918d8f5849d73;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 2c24d855455b80190edd9e2dcdca3ee8.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "38nZXNCohkjw3Bauae3WsbUgv0a-nusw7j28aBEZJFpEYO1fY289ZQ=="
-    }
-  },
-  "uuid" : "484ebdf0-7f2a-4625-b3c9-44430d0e0ccc",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-17",
-  "newScenarioState" : "scenario-2-api-apikey-login-18",
-  "insertionIndex" : 72
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-4a78dc19-bd47-4b47-8ce6-50f41192195e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-4a78dc19-bd47-4b47-8ce6-50f41192195e.json
new file mode 100644
index 00000000..96efb587
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-4a78dc19-bd47-4b47-8ce6-50f41192195e.json
@@ -0,0 +1,35 @@
+{
+  "id" : "4a78dc19-bd47-4b47-8ce6-50f41192195e",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-4a78dc19-bd47-4b47-8ce6-50f41192195e.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNShHE_IAMEKVg=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c276-5eaf8bc205e548a3095dab45;Parent=1b4038fc39ffa415;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:46 GMT",
+      "Via" : "1.1 59e4792b9d6184bfa491a317b36590d2.cloudfront.net (CloudFront), 1.1 dbfd9bcc806d4c322e72b461b2458112.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2760000000005c6d1bf53a789f8",
+      "x-amzn-RequestId" : "3b9d952d-4cf5-4fac-bc2f-d3727715450c",
+      "X-Amz-Cf-Id" : "-rrkc-bLeiJw3Bvx65J8RiffElezNNe0iDMIWZ78jOwatkujgkPoEQ==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "4a78dc19-bd47-4b47-8ce6-50f41192195e",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-20",
+  "newScenarioState" : "scenario-1-api-apikey-login-21",
+  "insertionIndex" : 28
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-4f2596b7-e287-4723-a9dc-fd2ad1063742.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-4f2596b7-e287-4723-a9dc-fd2ad1063742.json
new file mode 100644
index 00000000..8068f2f4
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-4f2596b7-e287-4723-a9dc-fd2ad1063742.json
@@ -0,0 +1,35 @@
+{
+  "id" : "4f2596b7-e287-4723-a9dc-fd2ad1063742",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-4f2596b7-e287-4723-a9dc-fd2ad1063742.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNTIFFYIAMEdng=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c27a-21360ee56e2b827e29179c6b;Parent=090086e790173c50;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:50 GMT",
+      "Via" : "1.1 8e6c2cf5874f5e4093136cc3de4d856a.cloudfront.net (CloudFront), 1.1 e82f2bd1d85893fad1abb144337e7368.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c27a000000002a0a805d3a284e0d",
+      "x-amzn-RequestId" : "f8d4c0e5-d4be-4e67-a8e7-37b75ce259f4",
+      "X-Amz-Cf-Id" : "qFSkL5SqxTv2e9H5R5VKCwFqtUmBN9htboQ_kKhhGkIJk4IRKD4WJw==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "4f2596b7-e287-4723-a9dc-fd2ad1063742",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-22",
+  "newScenarioState" : "scenario-1-api-apikey-login-23",
+  "insertionIndex" : 18
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-5535a856-31cf-4341-ba6d-cf5eeaf21060.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-5535a856-31cf-4341-ba6d-cf5eeaf21060.json
deleted file mode 100644
index 4350b672..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-5535a856-31cf-4341-ba6d-cf5eeaf21060.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "5535a856-31cf-4341-ba6d-cf5eeaf21060",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-5535a856-31cf-4341-ba6d-cf5eeaf21060.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:09:55 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "66f00efc-8a0d-41fd-b945-ca924b0f3cdd",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549a300000000369b3cc3a0a52c01",
-      "x-amz-apigw-id" : "Y9hxnFeSoAMESEA=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549a3-61b94210753294e611640149;Parent=3266d92d009283a4;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 b47176981720d8607d309e56e9510316.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "vnR-F5hfQ_5gn0kNDyg8MSKrzP7za4qXxE-ChT1FKnYOScYvVbm4Wg=="
-    }
-  },
-  "uuid" : "5535a856-31cf-4341-ba6d-cf5eeaf21060",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "Started",
-  "newScenarioState" : "scenario-2-api-apikey-login-2",
-  "insertionIndex" : 2
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-56c61687-3405-4c09-ab40-271bc54c8eaa.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-56c61687-3405-4c09-ab40-271bc54c8eaa.json
new file mode 100644
index 00000000..44d6af4b
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-56c61687-3405-4c09-ab40-271bc54c8eaa.json
@@ -0,0 +1,35 @@
+{
+  "id" : "56c61687-3405-4c09-ab40-271bc54c8eaa",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-56c61687-3405-4c09-ab40-271bc54c8eaa.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNNyEpToAMEuZw=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c257-155046561033ce2415607090;Parent=22a266f40a210959;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:15 GMT",
+      "Via" : "1.1 b521abc69f4dd055f355de798c5fb95a.cloudfront.net (CloudFront), 1.1 74e8c76139b8c7f9b11d5e4441c2a7a2.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2570000000062cd3946d76a6064",
+      "x-amzn-RequestId" : "09652963-c8b0-4853-a362-2c46b6e18c1f",
+      "X-Amz-Cf-Id" : "FJwfeJlUTJ3S_PW88OwTrR-hzbBbpyANwKiHh6gDqIdFObYtVJg1kQ==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "56c61687-3405-4c09-ab40-271bc54c8eaa",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-4",
+  "newScenarioState" : "scenario-1-api-apikey-login-5",
+  "insertionIndex" : 99
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-606c26c9-be94-4c86-933e-b673f52e5b19.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-606c26c9-be94-4c86-933e-b673f52e5b19.json
new file mode 100644
index 00000000..b1c263ab
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-606c26c9-be94-4c86-933e-b673f52e5b19.json
@@ -0,0 +1,35 @@
+{
+  "id" : "606c26c9-be94-4c86-933e-b673f52e5b19",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-606c26c9-be94-4c86-933e-b673f52e5b19.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNQiF7vIAMEVHg=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c269-3c7e467f558329fe078e5347;Parent=65e1898151e118a6;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:33 GMT",
+      "Via" : "1.1 95a087e13956fc03ffaeeaec4faa051a.cloudfront.net (CloudFront), 1.1 74e8c76139b8c7f9b11d5e4441c2a7a2.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2690000000011d7ec163cd3aa8b",
+      "x-amzn-RequestId" : "967f1ac4-1c93-49a6-99f4-9ddd67eeec30",
+      "X-Amz-Cf-Id" : "gW7NLb49yJh23GHxuGnrTyIqxrxPTXY7af0uu9WF3CIk7jMIZJehbw==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "606c26c9-be94-4c86-933e-b673f52e5b19",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-13",
+  "newScenarioState" : "scenario-1-api-apikey-login-14",
+  "insertionIndex" : 61
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-69a7d8ab-cdaa-41c0-9526-1a9f7b20fc37.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-69a7d8ab-cdaa-41c0-9526-1a9f7b20fc37.json
deleted file mode 100644
index 96caef64..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-69a7d8ab-cdaa-41c0-9526-1a9f7b20fc37.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "69a7d8ab-cdaa-41c0-9526-1a9f7b20fc37",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-69a7d8ab-cdaa-41c0-9526-1a9f7b20fc37.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:00 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "97f006a8-157b-415a-b4f3-8ae012ff8c5d",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549a8000000000b2352dacb44356f",
-      "x-amz-apigw-id" : "Y9hyaFbBoAMER3Q=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549a8-144801190ea1e2525aaee2f6;Parent=175926780b03f697;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 59e4792b9d6184bfa491a317b36590d2.cloudfront.net (CloudFront), 1.1 b3ccaedda78c63d5967b57382ceb4cbe.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "ZmjqeE5CYgtf9kEiPYUF3xwB_LO36laett1r2saXdrQLbQamW53GJg=="
-    }
-  },
-  "uuid" : "69a7d8ab-cdaa-41c0-9526-1a9f7b20fc37",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-4",
-  "newScenarioState" : "scenario-2-api-apikey-login-5",
-  "insertionIndex" : 8
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-6a0848d1-eaca-4c46-bae5-b125508c784e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-6a0848d1-eaca-4c46-bae5-b125508c784e.json
new file mode 100644
index 00000000..bc6bf599
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-6a0848d1-eaca-4c46-bae5-b125508c784e.json
@@ -0,0 +1,35 @@
+{
+  "id" : "6a0848d1-eaca-4c46-bae5-b125508c784e",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-6a0848d1-eaca-4c46-bae5-b125508c784e.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNNbHUmIAMEDDQ=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c255-4ced5f5b56b5719a70d46112;Parent=6d096d5589483ba7;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:13 GMT",
+      "Via" : "1.1 7fcfc911845f681c235b0b3f32f3e1c6.cloudfront.net (CloudFront), 1.1 ee5f8da78d4211a93c9dba8864a4067e.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2550000000074ed92e6bf935de7",
+      "x-amzn-RequestId" : "9e81e703-0afd-4143-b8d1-78336e61d146",
+      "X-Amz-Cf-Id" : "txFb8nO-8gaSSEIl67z9xJYiT7lBf23iZKRpdC2NQxyciHCspEAimA==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "6a0848d1-eaca-4c46-bae5-b125508c784e",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-2",
+  "newScenarioState" : "scenario-1-api-apikey-login-3",
+  "insertionIndex" : 104
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-759d12b9-6ea0-4626-a78e-fee98c968cd0.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-759d12b9-6ea0-4626-a78e-fee98c968cd0.json
new file mode 100644
index 00000000..f10007b8
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-759d12b9-6ea0-4626-a78e-fee98c968cd0.json
@@ -0,0 +1,35 @@
+{
+  "id" : "759d12b9-6ea0-4626-a78e-fee98c968cd0",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-759d12b9-6ea0-4626-a78e-fee98c968cd0.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNRqE64oAMEXaA=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c270-38fb940e042758292c4b9213;Parent=55539c5926fdf14c;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:40 GMT",
+      "Via" : "1.1 b7e07d6a19a4c8b2e410e9c1e173548c.cloudfront.net (CloudFront), 1.1 77f3c89ffd619275648d49ad13868570.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c27000000000497f667d35b929c0",
+      "x-amzn-RequestId" : "0360e5f9-0b10-46cc-b29d-3faab8415e51",
+      "X-Amz-Cf-Id" : "y2_8YpbaIt3ac8LFFmRlyTJh1-y7E9cRiSK72KkU8liEfPocoVzTVA==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "759d12b9-6ea0-4626-a78e-fee98c968cd0",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-17",
+  "newScenarioState" : "scenario-1-api-apikey-login-18",
+  "insertionIndex" : 42
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-781812c8-b6c4-4d8e-99a2-3561e8ab3abc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-781812c8-b6c4-4d8e-99a2-3561e8ab3abc.json
new file mode 100644
index 00000000..d81566c1
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-781812c8-b6c4-4d8e-99a2-3561e8ab3abc.json
@@ -0,0 +1,35 @@
+{
+  "id" : "781812c8-b6c4-4d8e-99a2-3561e8ab3abc",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-781812c8-b6c4-4d8e-99a2-3561e8ab3abc.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNTsGDeIAMEksQ=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c27d-687b923c7e8bc7eb2a87f15b;Parent=0c55e83002ce1418;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:53 GMT",
+      "Via" : "1.1 59e4792b9d6184bfa491a317b36590d2.cloudfront.net (CloudFront), 1.1 e82f2bd1d85893fad1abb144337e7368.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c27d0000000040fe784cfbeb634c",
+      "x-amzn-RequestId" : "b8d676e9-6c2f-429c-9bd6-ccad4f319caa",
+      "X-Amz-Cf-Id" : "hsspmRRvnRFnUJti0EXjwidtFWNTJCmWlS7DHzi1lme2srC3jOtn8g==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "781812c8-b6c4-4d8e-99a2-3561e8ab3abc",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-23",
+  "newScenarioState" : "scenario-1-api-apikey-login-24",
+  "insertionIndex" : 11
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-7b020c11-8526-4015-b99e-c484af08ef7d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-7b020c11-8526-4015-b99e-c484af08ef7d.json
deleted file mode 100644
index 1880c354..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-7b020c11-8526-4015-b99e-c484af08ef7d.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "7b020c11-8526-4015-b99e-c484af08ef7d",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-7b020c11-8526-4015-b99e-c484af08ef7d.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:26 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "070c15c3-c90c-4b21-9473-5430bd5af127",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549c20000000005a3936cdb704870",
-      "x-amz-apigw-id" : "Y9h2eEp9oAMEb4A=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549c2-1ff4f4b769234712128fa2c4;Parent=16c5fbc36200b2ac;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 a642518ef4d5fb78c3190de112922a38.cloudfront.net (CloudFront), 1.1 4ac8d091dce10e726cfc5404bfed72b8.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "btwh-IOaEW5NUJi_eXLR4U8MMdlzAwzOlV4t7Qmg6pdDOAwGuTPznA=="
-    }
-  },
-  "uuid" : "7b020c11-8526-4015-b99e-c484af08ef7d",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-13",
-  "newScenarioState" : "scenario-2-api-apikey-login-14",
-  "insertionIndex" : 53
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-7c2175d7-08d7-4548-a27f-6a5a294b0b41.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-7c2175d7-08d7-4548-a27f-6a5a294b0b41.json
deleted file mode 100644
index 2fa74b22..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-7c2175d7-08d7-4548-a27f-6a5a294b0b41.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "7c2175d7-08d7-4548-a27f-6a5a294b0b41",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-7c2175d7-08d7-4548-a27f-6a5a294b0b41.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:22 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "e5b348fd-0a8c-460c-8254-708854e768bc",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549be00000000532f82f94131f9a4",
-      "x-amz-apigw-id" : "Y9h1xG5voAMEbbg=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549be-5a648b885461655f513ebf8a;Parent=18ebda9fe19bbacc;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 5e599a9eda8861379cfef6a522da18e4.cloudfront.net (CloudFront), 1.1 dbfd9bcc806d4c322e72b461b2458112.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "vtGTKkIFdjeApB6lLfV314AOi-bjwWO3EcCyoBGTrBMcm1QZocEI9Q=="
-    }
-  },
-  "uuid" : "7c2175d7-08d7-4548-a27f-6a5a294b0b41",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-11",
-  "newScenarioState" : "scenario-2-api-apikey-login-12",
-  "insertionIndex" : 42
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-7e567525-8382-4555-b114-14e4fc3c4660.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-7e567525-8382-4555-b114-14e4fc3c4660.json
new file mode 100644
index 00000000..d8e72c88
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-7e567525-8382-4555-b114-14e4fc3c4660.json
@@ -0,0 +1,35 @@
+{
+  "id" : "7e567525-8382-4555-b114-14e4fc3c4660",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-7e567525-8382-4555-b114-14e4fc3c4660.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNQtHMhIAMEi1Q=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c26a-427553e50354513d6c65d1e8;Parent=40ca112ccac6f9b5;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:34 GMT",
+      "Via" : "1.1 724581b48d733e53834b535d2a623034.cloudfront.net (CloudFront), 1.1 a53bab1af200813b8f27e3c0a28b4964.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26a0000000026c1a8dcd920a142",
+      "x-amzn-RequestId" : "8e388c82-f1ba-49a3-ae3d-32fa9e2aa77d",
+      "X-Amz-Cf-Id" : "LqKQv9kGiK5wAlqdcZg9IvJMoSY5yd1pYn9XvGSxXGbBcnTGOmfY_Q==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "7e567525-8382-4555-b114-14e4fc3c4660",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-14",
+  "newScenarioState" : "scenario-1-api-apikey-login-15",
+  "insertionIndex" : 58
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-8008136f-69a7-4faf-9fcf-21456e9b10db.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-8008136f-69a7-4faf-9fcf-21456e9b10db.json
new file mode 100644
index 00000000..a491b27f
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-8008136f-69a7-4faf-9fcf-21456e9b10db.json
@@ -0,0 +1,35 @@
+{
+  "id" : "8008136f-69a7-4faf-9fcf-21456e9b10db",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-8008136f-69a7-4faf-9fcf-21456e9b10db.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNO-HmyoAMEbiA=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c25f-4169cb7073354a6a512e67ee;Parent=5dba7ed5b42f2ce9;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:23 GMT",
+      "Via" : "1.1 5e599a9eda8861379cfef6a522da18e4.cloudfront.net (CloudFront), 1.1 87247d9a9b2f9e51b0c72b364948aefa.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c25f0000000073c4af0b0ba7d74c",
+      "x-amzn-RequestId" : "a9923b50-6346-48d1-9e3e-ce958eff438f",
+      "X-Amz-Cf-Id" : "CfRdfz-zlKehvrMRs1BMRHV_zgquNFsYIlVcMBfbfxt2v2rzVrDPKA==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "8008136f-69a7-4faf-9fcf-21456e9b10db",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-8",
+  "newScenarioState" : "scenario-1-api-apikey-login-9",
+  "insertionIndex" : 84
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-80581847-dd25-409f-8755-4b33aa69aee8.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-80581847-dd25-409f-8755-4b33aa69aee8.json
new file mode 100644
index 00000000..c5bf9303
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-80581847-dd25-409f-8755-4b33aa69aee8.json
@@ -0,0 +1,35 @@
+{
+  "id" : "80581847-dd25-409f-8755-4b33aa69aee8",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-80581847-dd25-409f-8755-4b33aa69aee8.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNOqH_-IAMEN_w=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c25d-6d8d72f560a6753429931e20;Parent=3592a8e8571d3097;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:21 GMT",
+      "Via" : "1.1 8022fb6dd967fd5734dda3b51415b460.cloudfront.net (CloudFront), 1.1 77f3c89ffd619275648d49ad13868570.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c25d0000000051a612516ed95093",
+      "x-amzn-RequestId" : "0d4f20f2-800c-4df0-bab2-c281902afba7",
+      "X-Amz-Cf-Id" : "dobIJADdSp4jQuSGf0-_ao86WUbl09IXE6jcDBOpBTb3kCh2IO1Ebw==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "80581847-dd25-409f-8755-4b33aa69aee8",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-7",
+  "newScenarioState" : "scenario-1-api-apikey-login-8",
+  "insertionIndex" : 88
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-80e1d5d8-e0cc-4e71-a734-3f7e930ba46a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-80e1d5d8-e0cc-4e71-a734-3f7e930ba46a.json
deleted file mode 100644
index 9fde8b9c..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-80e1d5d8-e0cc-4e71-a734-3f7e930ba46a.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "80e1d5d8-e0cc-4e71-a734-3f7e930ba46a",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-80e1d5d8-e0cc-4e71-a734-3f7e930ba46a.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:30 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "833429ce-1223-4998-a977-eed0f9907b8b",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549c600000000686f9fb6bd7af0d3",
-      "x-amz-apigw-id" : "Y9h3AGy2IAMECTw=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549c6-1fb6e35d41e9770275955aaa;Parent=084e2d895982cabe;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 4c9457912580c6114eec78b8fa604a20.cloudfront.net (CloudFront), 1.1 0df7f27a01014ab815259ca2d88193c6.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "-s3nLEvBtXcbxO0uNP5rvfRk5UJCOLcQJghBzfMaP4sDSaJ-33w87Q=="
-    }
-  },
-  "uuid" : "80e1d5d8-e0cc-4e71-a734-3f7e930ba46a",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-15",
-  "newScenarioState" : "scenario-2-api-apikey-login-16",
-  "insertionIndex" : 61
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-84d6dd11-cbb0-4b17-be44-c652b3764846.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-84d6dd11-cbb0-4b17-be44-c652b3764846.json
new file mode 100644
index 00000000..bd316421
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-84d6dd11-cbb0-4b17-be44-c652b3764846.json
@@ -0,0 +1,35 @@
+{
+  "id" : "84d6dd11-cbb0-4b17-be44-c652b3764846",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-84d6dd11-cbb0-4b17-be44-c652b3764846.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNS2H7aIAMEmRQ=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c278-1a1684c45224eba36b8a4fb9;Parent=27748a81c2cc1470;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:48 GMT",
+      "Via" : "1.1 2be627c4e85d6d9d9e32a7523e1b67ee.cloudfront.net (CloudFront), 1.1 ffe9646b2ea911744e2d51fc0715cedc.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c27800000000030823e453a038f1",
+      "x-amzn-RequestId" : "114efd6a-8051-4a3d-8dbd-951670a8365d",
+      "X-Amz-Cf-Id" : "Lmf8qTBqJagSQzz_P28tWzCNtYkDqAAvGTArpFfU9F9JRXOuCe-7uQ==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "84d6dd11-cbb0-4b17-be44-c652b3764846",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-21",
+  "newScenarioState" : "scenario-1-api-apikey-login-22",
+  "insertionIndex" : 23
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-93450139-3433-4592-9bf4-4c19ec790822.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-93450139-3433-4592-9bf4-4c19ec790822.json
deleted file mode 100644
index e75da736..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-93450139-3433-4592-9bf4-4c19ec790822.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "93450139-3433-4592-9bf4-4c19ec790822",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-93450139-3433-4592-9bf4-4c19ec790822.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:09:58 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "930364c6-f920-4f31-abed-34d4a13ff4f5",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549a60000000022121c06999ca932",
-      "x-amz-apigw-id" : "Y9hyBGkVoAMEFqw=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549a6-4ec098ae0c1513774ca9fa09;Parent=2a2f469022314121;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 21c7c4234f218bb5110262cbbf01f870.cloudfront.net (CloudFront), 1.1 ee5f8da78d4211a93c9dba8864a4067e.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "BeLH-RVnhZuPmKHuLAsKT2TlfJYzCfXVwRNjIQnrhOX5LMcL0o1xXA=="
-    }
-  },
-  "uuid" : "93450139-3433-4592-9bf4-4c19ec790822",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-2",
-  "newScenarioState" : "scenario-2-api-apikey-login-3",
-  "insertionIndex" : 3
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-982796de-3113-4929-b363-c8674638f65c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-982796de-3113-4929-b363-c8674638f65c.json
new file mode 100644
index 00000000..cf4b79db
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-982796de-3113-4929-b363-c8674638f65c.json
@@ -0,0 +1,35 @@
+{
+  "id" : "982796de-3113-4929-b363-c8674638f65c",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-982796de-3113-4929-b363-c8674638f65c.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNSIFD9IAMEL1Q=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c273-6b65c8575f033c4e144c2a41;Parent=138cfff36740bcd7;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:43 GMT",
+      "Via" : "1.1 95a087e13956fc03ffaeeaec4faa051a.cloudfront.net (CloudFront), 1.1 fbb003dfc0617e3e058e3dac791dfd5a.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c273000000002b5fe9fcd90cba6f",
+      "x-amzn-RequestId" : "673b326f-8231-425e-a386-aeba2502ba3d",
+      "X-Amz-Cf-Id" : "gn1_mIVxQNFkpqNkSSnmWFz3swrrvt3t-wIZDVlLcfCINOr9mwKcbw==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "982796de-3113-4929-b363-c8674638f65c",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-19",
+  "newScenarioState" : "scenario-1-api-apikey-login-20",
+  "insertionIndex" : 34
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-9c3a1abc-552c-4596-919a-7e2fc9371273.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-9c3a1abc-552c-4596-919a-7e2fc9371273.json
new file mode 100644
index 00000000..ec947598
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-9c3a1abc-552c-4596-919a-7e2fc9371273.json
@@ -0,0 +1,35 @@
+{
+  "id" : "9c3a1abc-552c-4596-919a-7e2fc9371273",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-9c3a1abc-552c-4596-919a-7e2fc9371273.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNQ9F78IAMEFDA=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c26c-5569f2e545850c4c6be3d0fa;Parent=49b8a172f3acfd87;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:36 GMT",
+      "Via" : "1.1 b521abc69f4dd055f355de798c5fb95a.cloudfront.net (CloudFront), 1.1 ee5f8da78d4211a93c9dba8864a4067e.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26c000000007b2c6330e7efc62f",
+      "x-amzn-RequestId" : "d54603ae-92b3-41e0-b1fc-62e4b68fb866",
+      "X-Amz-Cf-Id" : "ln2Taf5EiX8lLha-IKwcvHuEtQWUWjVuLDWD-cJaVlphA9YiJTynFw==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "9c3a1abc-552c-4596-919a-7e2fc9371273",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-15",
+  "newScenarioState" : "scenario-1-api-apikey-login-16",
+  "insertionIndex" : 54
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-a1a4ba24-9737-4c42-9f2b-b2e43441ed0e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-a1a4ba24-9737-4c42-9f2b-b2e43441ed0e.json
deleted file mode 100644
index 66c5abaa..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-a1a4ba24-9737-4c42-9f2b-b2e43441ed0e.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "a1a4ba24-9737-4c42-9f2b-b2e43441ed0e",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-a1a4ba24-9737-4c42-9f2b-b2e43441ed0e.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:09:59 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "0819a94d-4c7e-40cd-a38c-9fbd355a38ee",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549a7000000004232d265976f5c07",
-      "x-amz-apigw-id" : "Y9hyRHg2IAMEO0g=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549a7-41f8a95015c753e8692a1ef3;Parent=6a3e7018d83d711f;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 4c9457912580c6114eec78b8fa604a20.cloudfront.net (CloudFront), 1.1 82fa7f20ab5a12301da8e01f9493e222.cloudfront.net (CloudFront)",
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-      "X-Amz-Cf-Id" : "OtxsQ7wsXJGBIw_Nt-6yyiTFDu3uiVSyt-lu56pyz45xT72DqHF-Rw=="
-    }
-  },
-  "uuid" : "a1a4ba24-9737-4c42-9f2b-b2e43441ed0e",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-3",
-  "newScenarioState" : "scenario-2-api-apikey-login-4",
-  "insertionIndex" : 6
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-a78a4e9e-b092-4464-911a-6ed2db700751.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-a78a4e9e-b092-4464-911a-6ed2db700751.json
deleted file mode 100644
index 5be5c1d2..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-a78a4e9e-b092-4464-911a-6ed2db700751.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "a78a4e9e-b092-4464-911a-6ed2db700751",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-a78a4e9e-b092-4464-911a-6ed2db700751.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:39 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "37859b84-e65c-4a33-9194-12e658825d5e",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549cf000000006bc21adcbd525040",
-      "x-amz-apigw-id" : "Y9h4gEKuoAMEVNg=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549cf-5e8bc01b380144023ada0eee;Parent=5a7fe98356262b5d;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 2c24d855455b80190edd9e2dcdca3ee8.cloudfront.net (CloudFront), 1.1 e6b2537b87653726af8a79e6da505188.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "2UdORh10dstcteGWe4YXXHH8zGeWD22tmSKodQvoJPTFDynp-CHrlg=="
-    }
-  },
-  "uuid" : "a78a4e9e-b092-4464-911a-6ed2db700751",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-18",
-  "newScenarioState" : "scenario-2-api-apikey-login-19",
-  "insertionIndex" : 77
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-afff7bb2-af0e-485a-a95b-cd1fd0cfa8cc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-afff7bb2-af0e-485a-a95b-cd1fd0cfa8cc.json
deleted file mode 100644
index d17df1b4..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-afff7bb2-af0e-485a-a95b-cd1fd0cfa8cc.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "afff7bb2-af0e-485a-a95b-cd1fd0cfa8cc",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-afff7bb2-af0e-485a-a95b-cd1fd0cfa8cc.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:12 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "d543bc61-c27f-4113-8c58-bd15d16a5c31",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549b400000000283ca5bcacd15ddc",
-      "x-amz-apigw-id" : "Y9h0QErDIAMEZBg=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549b4-6ef24b246af4a1c154b92aa7;Parent=2d0b774b58298f98;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 5e599a9eda8861379cfef6a522da18e4.cloudfront.net (CloudFront), 1.1 170efbc424be9181bda5d0fcd6e41f30.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "O5G1bBdPGJqkYvB6z2qk0h1X1WW3-sNbIKvGLeo7PzRQQg4KVQ1F7Q=="
-    }
-  },
-  "uuid" : "afff7bb2-af0e-485a-a95b-cd1fd0cfa8cc",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-6",
-  "newScenarioState" : "scenario-2-api-apikey-login-7",
-  "insertionIndex" : 19
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-b11a37c0-a4bb-49cb-b6e9-666b4d5ecb1f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-b11a37c0-a4bb-49cb-b6e9-666b4d5ecb1f.json
deleted file mode 100644
index f68cf7b5..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-b11a37c0-a4bb-49cb-b6e9-666b4d5ecb1f.json
+++ /dev/null
@@ -1,34 +0,0 @@
-{
-  "id" : "b11a37c0-a4bb-49cb-b6e9-666b4d5ecb1f",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-b11a37c0-a4bb-49cb-b6e9-666b4d5ecb1f.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:46 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "3a024ce9-0a26-4d2c-89a0-cc7fe172bcd5",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549d600000000336d8642beb36778",
-      "x-amz-apigw-id" : "Y9h5hFYnoAMEqdA=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549d6-3d08e864203cc5a41456f614;Parent=5af22dc9db94ba64;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 a642518ef4d5fb78c3190de112922a38.cloudfront.net (CloudFront), 1.1 65f2e9f7f1475de54aa452d3ceb9bcf6.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "nsAdKWw7RPU31SYq7M_RMV4RdIxAuTIjhSYZOHtdqw3hPtGmr-1uFQ=="
-    }
-  },
-  "uuid" : "b11a37c0-a4bb-49cb-b6e9-666b4d5ecb1f",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-20",
-  "insertionIndex" : 89
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-b6bb3d63-3c6f-49df-8d37-df606beb0693.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-b6bb3d63-3c6f-49df-8d37-df606beb0693.json
deleted file mode 100644
index 1bd454d7..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-b6bb3d63-3c6f-49df-8d37-df606beb0693.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
-  "id" : "b6bb3d63-3c6f-49df-8d37-df606beb0693",
-  "name" : "api_apikey_login",
-  "request" : {
-    "url" : "/api/apikey/login",
-    "method" : "POST"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "api_apikey_login-b6bb3d63-3c6f-49df-8d37-df606beb0693.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:44 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "7796d028-379d-48e6-9991-7924c6ffc1ae",
-      "x-amzn-Remapped-content-length" : "395",
-      "x-bt-internal-trace-id" : "699549d300000000297ba26b5300497e",
-      "x-amz-apigw-id" : "Y9h5LEN_IAMERew=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549d3-5758f3117c2785184bd62170;Parent=4e86d5ff5cae6357;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 2c24d855455b80190edd9e2dcdca3ee8.cloudfront.net (CloudFront), 1.1 f8731007efc5ab360d90cee573a1e916.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "87Mg6KcSvoFFX1LTvfVuLGkvcbRDouhXZbxG12B3qc-efWTg5tVwnw=="
-    }
-  },
-  "uuid" : "b6bb3d63-3c6f-49df-8d37-df606beb0693",
-  "persistent" : true,
-  "scenarioName" : "scenario-2-api-apikey-login",
-  "requiredScenarioState" : "scenario-2-api-apikey-login-19",
-  "newScenarioState" : "scenario-2-api-apikey-login-20",
-  "insertionIndex" : 84
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-b7fa8ce1-f10c-47ac-b359-ddbb0c1b1ac7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-b7fa8ce1-f10c-47ac-b359-ddbb0c1b1ac7.json
new file mode 100644
index 00000000..1e0ef8a5
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-b7fa8ce1-f10c-47ac-b359-ddbb0c1b1ac7.json
@@ -0,0 +1,35 @@
+{
+  "id" : "b7fa8ce1-f10c-47ac-b359-ddbb0c1b1ac7",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-b7fa8ce1-f10c-47ac-b359-ddbb0c1b1ac7.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNPKFqqoAMEQ4w=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c260-2b88f38a2a653ab175492e12;Parent=342584449efedccf;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:24 GMT",
+      "Via" : "1.1 95a087e13956fc03ffaeeaec4faa051a.cloudfront.net (CloudFront), 1.1 77f3c89ffd619275648d49ad13868570.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26000000000515750e488210c3d",
+      "x-amzn-RequestId" : "e264c03d-cd1e-4f45-b410-669af02f2b9e",
+      "X-Amz-Cf-Id" : "QcZbrq6u3hGWCiNwtmNPLSe8OFDVgUaXNKJFNT8C-_wc0lBjOv5k2Q==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "b7fa8ce1-f10c-47ac-b359-ddbb0c1b1ac7",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-9",
+  "newScenarioState" : "scenario-1-api-apikey-login-10",
+  "insertionIndex" : 81
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-bed02d58-ffff-422d-b13f-6b091acaaf22.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-bed02d58-ffff-422d-b13f-6b091acaaf22.json
new file mode 100644
index 00000000..3fa16216
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-bed02d58-ffff-422d-b13f-6b091acaaf22.json
@@ -0,0 +1,35 @@
+{
+  "id" : "bed02d58-ffff-422d-b13f-6b091acaaf22",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-bed02d58-ffff-422d-b13f-6b091acaaf22.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNOZFa6IAMEOtQ=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c25b-6b7965a77c6768d245bac617;Parent=39b9a8afb40d2516;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:19 GMT",
+      "Via" : "1.1 2c24d855455b80190edd9e2dcdca3ee8.cloudfront.net (CloudFront), 1.1 d525041695bdb6325f78ebba5c11b8a2.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c25b0000000070808d7c79c399b4",
+      "x-amzn-RequestId" : "5be66b42-02c2-4db7-a72b-42e411d93009",
+      "X-Amz-Cf-Id" : "7KxzmUJzwpVRLVvUOyIRQCW8IK79gJTuTcGBAvk_KVmcx6NXdS-HTg==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "bed02d58-ffff-422d-b13f-6b091acaaf22",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-6",
+  "newScenarioState" : "scenario-1-api-apikey-login-7",
+  "insertionIndex" : 91
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-d7048ba1-ee7e-4abc-894e-90267aaf249b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-d7048ba1-ee7e-4abc-894e-90267aaf249b.json
new file mode 100644
index 00000000..ceb267e0
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-d7048ba1-ee7e-4abc-894e-90267aaf249b.json
@@ -0,0 +1,35 @@
+{
+  "id" : "d7048ba1-ee7e-4abc-894e-90267aaf249b",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-d7048ba1-ee7e-4abc-894e-90267aaf249b.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNQTHoVIAMEEjw=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c267-5167b3715b0d7de0596868f0;Parent=090e3e95ab02105d;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:32 GMT",
+      "Via" : "1.1 8022fb6dd967fd5734dda3b51415b460.cloudfront.net (CloudFront), 1.1 fbb003dfc0617e3e058e3dac791dfd5a.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c267000000004ee44cef90707346",
+      "x-amzn-RequestId" : "6a40c1a2-60aa-4562-b71f-349b8f82111e",
+      "X-Amz-Cf-Id" : "rsGh0TD_Dq40MoQIsOlBkoMPJa2yQDtdynojynmJRytjDdlwRDGfMw==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "d7048ba1-ee7e-4abc-894e-90267aaf249b",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-12",
+  "newScenarioState" : "scenario-1-api-apikey-login-13",
+  "insertionIndex" : 65
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-f87c31f2-aed8-45d3-8976-91d44c3925f0.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-f87c31f2-aed8-45d3-8976-91d44c3925f0.json
new file mode 100644
index 00000000..2847b75e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/api_apikey_login-f87c31f2-aed8-45d3-8976-91d44c3925f0.json
@@ -0,0 +1,35 @@
+{
+  "id" : "f87c31f2-aed8-45d3-8976-91d44c3925f0",
+  "name" : "api_apikey_login",
+  "request" : {
+    "url" : "/api/apikey/login",
+    "method" : "POST"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "api_apikey_login-f87c31f2-aed8-45d3-8976-91d44c3925f0.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNN6GiLIAMEYPQ=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "395",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c258-132edf1e769e33306c662e4a;Parent=54c9c8ea2ffb6be8;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:16 GMT",
+      "Via" : "1.1 8022fb6dd967fd5734dda3b51415b460.cloudfront.net (CloudFront), 1.1 a40ac7dad0e348fc93799233c9af5960.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2580000000032b95c5e518a71ee",
+      "x-amzn-RequestId" : "042e47c6-47e1-4057-81d3-df25a636c0cb",
+      "X-Amz-Cf-Id" : "5vFaxYgZrZvra4A1Bj3xl_jv0AxkFdz3oS753GOjpRHblMs3XLBjeQ==",
+      "etag" : "W/\"18b-OPCBBHzVVuCPaglXVbFjmsFzOoE\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "f87c31f2-aed8-45d3-8976-91d44c3925f0",
+  "persistent" : true,
+  "scenarioName" : "scenario-1-api-apikey-login",
+  "requiredScenarioState" : "scenario-1-api-apikey-login-5",
+  "newScenarioState" : "scenario-1-api-apikey-login-6",
+  "insertionIndex" : 97
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-04616db9-d56c-410f-adf7-fcb68ba1614b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-04616db9-d56c-410f-adf7-fcb68ba1614b.json
new file mode 100644
index 00000000..11064ba3
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-04616db9-d56c-410f-adf7-fcb68ba1614b.json
@@ -0,0 +1,42 @@
+{
+  "id" : "04616db9-d56c-410f-adf7-fcb68ba1614b",
+  "name" : "btql",
+  "request" : {
+    "url" : "/btql",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"query\":{\"select\":[{\"op\":\"star\"}],\"from\":{\"op\":\"function\",\"name\":{\"op\":\"ident\",\"name\":[\"project_logs\"]},\"args\":[{\"op\":\"literal\",\"value\":\"6ae68365-7620-4630-921b-bac416634fc8\"}]},\"filter\":{\"op\":\"and\",\"left\":{\"op\":\"eq\",\"left\":{\"op\":\"ident\",\"name\":[\"root_span_id\"]},\"right\":{\"op\":\"literal\",\"value\":\"fd8f671b0bd3f68c9a0521a6e419be78\"}},\"right\":{\"op\":\"ne\",\"left\":{\"op\":\"ident\",\"name\":[\"span_parents\"]},\"right\":{\"op\":\"literal\",\"value\":null}}},\"sort\":[{\"expr\":{\"op\":\"ident\",\"name\":[\"created\"]},\"dir\":\"asc\"}],\"limit\":1000},\"use_columnstore\":true,\"use_brainstore\":true,\"brainstore_realtime\":true}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "btql-04616db9-d56c-410f-adf7-fcb68ba1614b.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNnrH5uoAMEqNg=",
+      "vary" : "Origin",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "x-bt-brainstore-duration-ms" : "513",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2fd-2456403157f44cd16f9f294a;Parent=41e34cbfe72d4cc2;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "526",
+      "Date" : "Wed, 08 Apr 2026 21:05:02 GMT",
+      "Via" : "1.1 b521abc69f4dd055f355de798c5fb95a.cloudfront.net (CloudFront), 1.1 96f6dcbb4d7267cad6eb0747bce72024.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2fd000000005ac3940693a6e74e",
+      "x-amzn-RequestId" : "57b18bd9-e83e-432f-89ce-177e92e2b8c8",
+      "X-Amz-Cf-Id" : "LVxs6cZxJVttqU0ARh0FHMpur3rTJTYhINgwSWRsKDaiflLJpQUsMA==",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "04616db9-d56c-410f-adf7-fcb68ba1614b",
+  "persistent" : true,
+  "insertionIndex" : 107
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-0809fa2c-f934-4e68-aa6c-d4800988615d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-0809fa2c-f934-4e68-aa6c-d4800988615d.json
new file mode 100644
index 00000000..8e8fbe50
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-0809fa2c-f934-4e68-aa6c-d4800988615d.json
@@ -0,0 +1,42 @@
+{
+  "id" : "0809fa2c-f934-4e68-aa6c-d4800988615d",
+  "name" : "btql",
+  "request" : {
+    "url" : "/btql",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"query\":{\"select\":[{\"op\":\"star\"}],\"from\":{\"op\":\"function\",\"name\":{\"op\":\"ident\",\"name\":[\"project_logs\"]},\"args\":[{\"op\":\"literal\",\"value\":\"6ae68365-7620-4630-921b-bac416634fc8\"}]},\"filter\":{\"op\":\"and\",\"left\":{\"op\":\"eq\",\"left\":{\"op\":\"ident\",\"name\":[\"root_span_id\"]},\"right\":{\"op\":\"literal\",\"value\":\"e6d2c2e19f7993fb51d1cf1bfd2d19ae\"}},\"right\":{\"op\":\"ne\",\"left\":{\"op\":\"ident\",\"name\":[\"span_parents\"]},\"right\":{\"op\":\"literal\",\"value\":null}}},\"sort\":[{\"expr\":{\"op\":\"ident\",\"name\":[\"created\"]},\"dir\":\"asc\"}],\"limit\":1000},\"use_columnstore\":true,\"use_brainstore\":true,\"brainstore_realtime\":true}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "btql-0809fa2c-f934-4e68-aa6c-d4800988615d.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNd-G3tIAMENGw=",
+      "vary" : "Origin",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "x-bt-brainstore-duration-ms" : "118",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2bf-314c84a073a9c9fe0dbe77e7;Parent=55f8f00208a2e512;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "133",
+      "Date" : "Wed, 08 Apr 2026 21:03:59 GMT",
+      "Via" : "1.1 db84db36e16ca0c80b0992006d731900.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2bf00000000454f874cd6d14f01",
+      "x-amzn-RequestId" : "e557b59d-62e2-4c94-a570-f538c563162b",
+      "X-Amz-Cf-Id" : "1Uu-9LLM1B9sG1OrRQgIB5-M_hH6gGmZ8A5Fns10Y3MH_A7XH6FEnw==",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "0809fa2c-f934-4e68-aa6c-d4800988615d",
+  "persistent" : true,
+  "insertionIndex" : 112
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-0826723c-ec2e-47a6-9b30-8cefd9616d16.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-0826723c-ec2e-47a6-9b30-8cefd9616d16.json
new file mode 100644
index 00000000..1c62bb68
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-0826723c-ec2e-47a6-9b30-8cefd9616d16.json
@@ -0,0 +1,42 @@
+{
+  "id" : "0826723c-ec2e-47a6-9b30-8cefd9616d16",
+  "name" : "btql",
+  "request" : {
+    "url" : "/btql",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"query\":{\"select\":[{\"op\":\"star\"}],\"from\":{\"op\":\"function\",\"name\":{\"op\":\"ident\",\"name\":[\"project_logs\"]},\"args\":[{\"op\":\"literal\",\"value\":\"6ae68365-7620-4630-921b-bac416634fc8\"}]},\"filter\":{\"op\":\"and\",\"left\":{\"op\":\"eq\",\"left\":{\"op\":\"ident\",\"name\":[\"root_span_id\"]},\"right\":{\"op\":\"literal\",\"value\":\"20dd6aff138e74fa5cf0dfcfd0027110\"}},\"right\":{\"op\":\"ne\",\"left\":{\"op\":\"ident\",\"name\":[\"span_parents\"]},\"right\":{\"op\":\"literal\",\"value\":null}}},\"sort\":[{\"expr\":{\"op\":\"ident\",\"name\":[\"created\"]},\"dir\":\"asc\"}],\"limit\":1000},\"use_columnstore\":true,\"use_brainstore\":true,\"brainstore_realtime\":true}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "btql-0826723c-ec2e-47a6-9b30-8cefd9616d16.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNcgFffIAMEGMg=",
+      "vary" : "Origin",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "x-bt-brainstore-duration-ms" : "244",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2b6-0c2fb3c339fd036b66ff1c75;Parent=6d03d4e3e1c5b2c2;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "261",
+      "Date" : "Wed, 08 Apr 2026 21:03:50 GMT",
+      "Via" : "1.1 d08613e1dd8ad614e47875ae31a8af20.cloudfront.net (CloudFront), 1.1 a40ac7dad0e348fc93799233c9af5960.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2b6000000004da843d90a129d5a",
+      "x-amzn-RequestId" : "63a4dba9-40a9-4414-b105-43b4e0bbe7fa",
+      "X-Amz-Cf-Id" : "hg8qJOpCca9cIsqKdrF8klDVVXcg_1GoOQRRoQOP6X8xpHRLQOFKZA==",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "0826723c-ec2e-47a6-9b30-8cefd9616d16",
+  "persistent" : true,
+  "insertionIndex" : 125
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-105429c4-dada-46d8-bd0a-cd154324b41c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-105429c4-dada-46d8-bd0a-cd154324b41c.json
new file mode 100644
index 00000000..4f765d5b
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-105429c4-dada-46d8-bd0a-cd154324b41c.json
@@ -0,0 +1,42 @@
+{
+  "id" : "105429c4-dada-46d8-bd0a-cd154324b41c",
+  "name" : "btql",
+  "request" : {
+    "url" : "/btql",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"query\":{\"select\":[{\"op\":\"star\"}],\"from\":{\"op\":\"function\",\"name\":{\"op\":\"ident\",\"name\":[\"project_logs\"]},\"args\":[{\"op\":\"literal\",\"value\":\"6ae68365-7620-4630-921b-bac416634fc8\"}]},\"filter\":{\"op\":\"and\",\"left\":{\"op\":\"eq\",\"left\":{\"op\":\"ident\",\"name\":[\"root_span_id\"]},\"right\":{\"op\":\"literal\",\"value\":\"824f5baa00fc13bd2ef81a2557cd30fb\"}},\"right\":{\"op\":\"ne\",\"left\":{\"op\":\"ident\",\"name\":[\"span_parents\"]},\"right\":{\"op\":\"literal\",\"value\":null}}},\"sort\":[{\"expr\":{\"op\":\"ident\",\"name\":[\"created\"]},\"dir\":\"asc\"}],\"limit\":1000},\"use_columnstore\":true,\"use_brainstore\":true,\"brainstore_realtime\":true}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "btql-105429c4-dada-46d8-bd0a-cd154324b41c.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNdTGJ6oAMEtvA=",
+      "vary" : "Origin",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "x-bt-brainstore-duration-ms" : "155",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2bb-6fbc3a293a0f14303f8329e8;Parent=10e5d3bb150d7eb0;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "167",
+      "Date" : "Wed, 08 Apr 2026 21:03:55 GMT",
+      "Via" : "1.1 59e4792b9d6184bfa491a317b36590d2.cloudfront.net (CloudFront), 1.1 d525041695bdb6325f78ebba5c11b8a2.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2bb00000000159cda3ee3334556",
+      "x-amzn-RequestId" : "ae53f43f-8cfa-422b-846c-917e5f3f2e5b",
+      "X-Amz-Cf-Id" : "d4RN791W5KjyeeEIICV7Dx1MXCkkwZ0LnNfv2Y_WBOers9bIk2WUrw==",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "105429c4-dada-46d8-bd0a-cd154324b41c",
+  "persistent" : true,
+  "insertionIndex" : 120
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-20344aa0-82d3-45a1-a0a8-d1a34775af7a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-20344aa0-82d3-45a1-a0a8-d1a34775af7a.json
deleted file mode 100644
index d64f76ec..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-20344aa0-82d3-45a1-a0a8-d1a34775af7a.json
+++ /dev/null
@@ -1,43 +0,0 @@
-{
-  "id" : "20344aa0-82d3-45a1-a0a8-d1a34775af7a",
-  "name" : "btql",
-  "request" : {
-    "url" : "/btql",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"query\":\"select: span_id, span_parents, root_span_id, name | from: project_logs('6ae68365-7620-4630-921b-bac416634fc8') | filter: root_span_id = '1cd73a8507ab9c0feab656e9dcaf2884'\"}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "btql-20344aa0-82d3-45a1-a0a8-d1a34775af7a.json",
-    "headers" : {
-      "Content-Type" : "application/json",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:42 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "008a80cb-3cc9-47e4-a22f-89a2008363f2",
-      "x-bt-brainstore-duration-ms" : "87",
-      "x-bt-api-duration-ms" : "106",
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-2828901c-e14f-4f60-a8ca-8534740d885b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-2828901c-e14f-4f60-a8ca-8534740d885b.json
new file mode 100644
index 00000000..835ae271
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@@ -0,0 +1,42 @@
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-429a7e1d-67c5-4c74-9a2e-9548c23a2ec2.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-429a7e1d-67c5-4c74-9a2e-9548c23a2ec2.json
new file mode 100644
index 00000000..09aa33a3
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-429a7e1d-67c5-4c74-9a2e-9548c23a2ec2.json
@@ -0,0 +1,46 @@
+{
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+  "name" : "btql",
+  "request" : {
+    "url" : "/btql",
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+    "headers" : {
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+        "equalTo" : "application/json"
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-48e9a7f1-0797-4c88-a91b-4bfcfd65b631.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-48e9a7f1-0797-4c88-a91b-4bfcfd65b631.json
new file mode 100644
index 00000000..803219af
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-48e9a7f1-0797-4c88-a91b-4bfcfd65b631.json
@@ -0,0 +1,42 @@
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+  "name" : "btql",
+  "request" : {
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+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-4967a259-82b9-4828-a338-e92e936c2c99.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-4967a259-82b9-4828-a338-e92e936c2c99.json
new file mode 100644
index 00000000..2bc811f3
--- /dev/null
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@@ -0,0 +1,42 @@
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-4b4b0168-674f-468e-a431-0f568e23ee1e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-4b4b0168-674f-468e-a431-0f568e23ee1e.json
new file mode 100644
index 00000000..574d815e
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+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-4b4b0168-674f-468e-a431-0f568e23ee1e.json
@@ -0,0 +1,42 @@
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+  "request" : {
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+      "ignoreExtraElements" : false
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-5ca6433f-f9fa-416e-ac5c-085100b0c23d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-5ca6433f-f9fa-416e-ac5c-085100b0c23d.json
new file mode 100644
index 00000000..1dca35d4
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@@ -0,0 +1,42 @@
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new file mode 100644
index 00000000..73220566
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new file mode 100644
index 00000000..f887361b
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new file mode 100644
index 00000000..9d94feee
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@@ -0,0 +1,42 @@
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new file mode 100644
index 00000000..92039f0e
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+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "x-bt-brainstore-duration-ms" : "101",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2b4-55f2e2213870fded02c74f62;Parent=5f24a6eff5e39686;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "117",
+      "Date" : "Wed, 08 Apr 2026 21:03:48 GMT",
+      "Via" : "1.1 20b3731a0ef4aba3db1fcd63c3ef2b2a.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2b4000000004c790846b71efee2",
+      "x-amzn-RequestId" : "c4ae12ac-a16e-4d25-94d0-b0db4a6b7be8",
+      "X-Amz-Cf-Id" : "J0ktRKQk_T79te5Oqm97JXflEHryc4_qOCKcL8t94UMpzOyfTzuHkg==",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "70c6b680-e9e8-4542-97c5-7bf0e783961b",
+  "persistent" : true,
+  "insertionIndex" : 127
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-7320bb58-2f2e-4187-86b5-98c319e6f1e9.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-7320bb58-2f2e-4187-86b5-98c319e6f1e9.json
deleted file mode 100644
index 7477b700..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-7320bb58-2f2e-4187-86b5-98c319e6f1e9.json
+++ /dev/null
@@ -1,42 +0,0 @@
-{
-  "id" : "7320bb58-2f2e-4187-86b5-98c319e6f1e9",
-  "name" : "btql",
-  "request" : {
-    "url" : "/btql",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"query\":\"SELECT max(_xact_id) as version FROM dataset('0855b29c-69ba-4f98-9154-61a40334a492')\"}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "btql-7320bb58-2f2e-4187-86b5-98c319e6f1e9.json",
-    "headers" : {
-      "Content-Type" : "application/json",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:15 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "96b12428-f088-48a4-8b6d-ce778b1b105b",
-      "x-bt-brainstore-duration-ms" : "73",
-      "x-bt-api-duration-ms" : "81",
-      "x-bt-internal-trace-id" : "699549b700000000567cf68fd75239c6",
-      "x-amz-apigw-id" : "Y9h0xE1ooAMErjw=",
-      "vary" : "Origin",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549b7-12c4ee0a0d8b273c504b112d;Parent=6d54701044830327;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 b7e07d6a19a4c8b2e410e9c1e173548c.cloudfront.net (CloudFront), 1.1 83d24992402f7b214901ab76fbdc11e2.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "JfiJ2ZArE3YVxsAsD6Z6sD22Q3kK_RMtu8D7skeXAhY38gtUMKkBHg=="
-    }
-  },
-  "uuid" : "7320bb58-2f2e-4187-86b5-98c319e6f1e9",
-  "persistent" : true,
-  "insertionIndex" : 27
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-7a7d3013-84cd-4013-a6c0-12a0be75c1a8.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-7a7d3013-84cd-4013-a6c0-12a0be75c1a8.json
new file mode 100644
index 00000000..e92143bc
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-7a7d3013-84cd-4013-a6c0-12a0be75c1a8.json
@@ -0,0 +1,42 @@
+{
+  "id" : "7a7d3013-84cd-4013-a6c0-12a0be75c1a8",
+  "name" : "btql",
+  "request" : {
+    "url" : "/btql",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"query\":{\"select\":[{\"op\":\"star\"}],\"from\":{\"op\":\"function\",\"name\":{\"op\":\"ident\",\"name\":[\"project_logs\"]},\"args\":[{\"op\":\"literal\",\"value\":\"6ae68365-7620-4630-921b-bac416634fc8\"}]},\"filter\":{\"op\":\"and\",\"left\":{\"op\":\"eq\",\"left\":{\"op\":\"ident\",\"name\":[\"root_span_id\"]},\"right\":{\"op\":\"literal\",\"value\":\"3fbd6d4cc02394b9e14a1111813853b1\"}},\"right\":{\"op\":\"ne\",\"left\":{\"op\":\"ident\",\"name\":[\"span_parents\"]},\"right\":{\"op\":\"literal\",\"value\":null}}},\"sort\":[{\"expr\":{\"op\":\"ident\",\"name\":[\"created\"]},\"dir\":\"asc\"}],\"limit\":1000},\"use_columnstore\":true,\"use_brainstore\":true,\"brainstore_realtime\":true}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "btql-7a7d3013-84cd-4013-a6c0-12a0be75c1a8.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNc_ENXoAMEp1g=",
+      "vary" : "Origin",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "x-bt-brainstore-duration-ms" : "1346",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2b9-2b11897375f7b9f9596ab02c;Parent=2be7f580b7ac2edc;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "1359",
+      "Date" : "Wed, 08 Apr 2026 21:03:54 GMT",
+      "Via" : "1.1 724581b48d733e53834b535d2a623034.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2b90000000074e8fcae78b52f83",
+      "x-amzn-RequestId" : "0520b9be-5796-4b88-8f91-2bd23f1626ce",
+      "X-Amz-Cf-Id" : "8pErCWKtYWVoMEgtPIvF2iF-F2CTRyoz--1wL9aW16p56moOxhZUKg==",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "7a7d3013-84cd-4013-a6c0-12a0be75c1a8",
+  "persistent" : true,
+  "insertionIndex" : 122
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-82d948aa-8ee5-4c5a-8e71-45c5ae46a179.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-82d948aa-8ee5-4c5a-8e71-45c5ae46a179.json
new file mode 100644
index 00000000..bc4c9f36
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-82d948aa-8ee5-4c5a-8e71-45c5ae46a179.json
@@ -0,0 +1,42 @@
+{
+  "id" : "82d948aa-8ee5-4c5a-8e71-45c5ae46a179",
+  "name" : "btql",
+  "request" : {
+    "url" : "/btql",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"query\":{\"select\":[{\"op\":\"star\"}],\"from\":{\"op\":\"function\",\"name\":{\"op\":\"ident\",\"name\":[\"project_logs\"]},\"args\":[{\"op\":\"literal\",\"value\":\"6ae68365-7620-4630-921b-bac416634fc8\"}]},\"filter\":{\"op\":\"and\",\"left\":{\"op\":\"eq\",\"left\":{\"op\":\"ident\",\"name\":[\"root_span_id\"]},\"right\":{\"op\":\"literal\",\"value\":\"538acae6f882d11b9e695c275c0de6e6\"}},\"right\":{\"op\":\"ne\",\"left\":{\"op\":\"ident\",\"name\":[\"span_parents\"]},\"right\":{\"op\":\"literal\",\"value\":null}}},\"sort\":[{\"expr\":{\"op\":\"ident\",\"name\":[\"created\"]},\"dir\":\"asc\"}],\"limit\":1000},\"use_columnstore\":true,\"use_brainstore\":true,\"brainstore_realtime\":true}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "btql-82d948aa-8ee5-4c5a-8e71-45c5ae46a179.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNdOFQ2IAMEQ_g=",
+      "vary" : "Origin",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "x-bt-brainstore-duration-ms" : "95",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2ba-405d7c753a515f4c3ec891c2;Parent=4e1b8552ecf9f89b;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "113",
+      "Date" : "Wed, 08 Apr 2026 21:03:54 GMT",
+      "Via" : "1.1 b47176981720d8607d309e56e9510316.cloudfront.net (CloudFront), 1.1 d525041695bdb6325f78ebba5c11b8a2.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2ba00000000370995fba59644ed",
+      "x-amzn-RequestId" : "b6148d4c-952f-40a2-8553-2fb4764522ca",
+      "X-Amz-Cf-Id" : "l_4F7H2zK-_DVIivGFkQvQbf848p06UhJeEge1EbXcEoFgJnNzf5cg==",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "82d948aa-8ee5-4c5a-8e71-45c5ae46a179",
+  "persistent" : true,
+  "insertionIndex" : 121
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-8ec14f09-206a-4621-81e3-6597bca7d6ed.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-8ec14f09-206a-4621-81e3-6597bca7d6ed.json
new file mode 100644
index 00000000..54a5a9aa
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-8ec14f09-206a-4621-81e3-6597bca7d6ed.json
@@ -0,0 +1,42 @@
+{
+  "id" : "8ec14f09-206a-4621-81e3-6597bca7d6ed",
+  "name" : "btql",
+  "request" : {
+    "url" : "/btql",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"query\":\"SELECT max(_xact_id) as version FROM dataset('0855b29c-69ba-4f98-9154-61a40334a492')\"}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "btql-8ec14f09-206a-4621-81e3-6597bca7d6ed.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNPvGDEIAMEn_A=",
+      "vary" : "Origin",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "x-bt-brainstore-duration-ms" : "183",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c264-1b779c5c1284ba8a029ceba1;Parent=426fb020e9c89ae8;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "275",
+      "Date" : "Wed, 08 Apr 2026 21:02:28 GMT",
+      "Via" : "1.1 db84db36e16ca0c80b0992006d731900.cloudfront.net (CloudFront), 1.1 da32b45f2cc22dc818960285c4e91b66.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c264000000002f6d8b6472be7f09",
+      "x-amzn-RequestId" : "23cbfeb0-0d01-44b3-a515-35f61286043d",
+      "X-Amz-Cf-Id" : "9rorkvepLKh2PjModt_5yF2s_qMs3zqSWBMcO7tAwyLaoOl7Yj9ywA==",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "8ec14f09-206a-4621-81e3-6597bca7d6ed",
+  "persistent" : true,
+  "insertionIndex" : 73
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-96c61fea-07a1-4578-a8e0-4d3571e5c956.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-96c61fea-07a1-4578-a8e0-4d3571e5c956.json
new file mode 100644
index 00000000..9cfb76df
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-96c61fea-07a1-4578-a8e0-4d3571e5c956.json
@@ -0,0 +1,42 @@
+{
+  "id" : "96c61fea-07a1-4578-a8e0-4d3571e5c956",
+  "name" : "btql",
+  "request" : {
+    "url" : "/btql",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"query\":{\"select\":[{\"op\":\"star\"}],\"from\":{\"op\":\"function\",\"name\":{\"op\":\"ident\",\"name\":[\"project_logs\"]},\"args\":[{\"op\":\"literal\",\"value\":\"6ae68365-7620-4630-921b-bac416634fc8\"}]},\"filter\":{\"op\":\"and\",\"left\":{\"op\":\"eq\",\"left\":{\"op\":\"ident\",\"name\":[\"root_span_id\"]},\"right\":{\"op\":\"literal\",\"value\":\"b405bc07e8cb44dc0cc35f1663bba695\"}},\"right\":{\"op\":\"ne\",\"left\":{\"op\":\"ident\",\"name\":[\"span_parents\"]},\"right\":{\"op\":\"literal\",\"value\":null}}},\"sort\":[{\"expr\":{\"op\":\"ident\",\"name\":[\"created\"]},\"dir\":\"asc\"}],\"limit\":1000},\"use_columnstore\":true,\"use_brainstore\":true,\"brainstore_realtime\":true}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "btql-96c61fea-07a1-4578-a8e0-4d3571e5c956.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNb7Gj3IAMEdlQ=",
+      "vary" : "Origin",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "x-bt-brainstore-duration-ms" : "510",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2b2-4f182aaf56af87a409eac223;Parent=75670a77574e7a73;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "526",
+      "Date" : "Wed, 08 Apr 2026 21:03:46 GMT",
+      "Via" : "1.1 b7e07d6a19a4c8b2e410e9c1e173548c.cloudfront.net (CloudFront), 1.1 d525041695bdb6325f78ebba5c11b8a2.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2b2000000007798f298f2146eaa",
+      "x-amzn-RequestId" : "664ad0a8-f9cc-404e-900e-f8a9d046e1cb",
+      "X-Amz-Cf-Id" : "40e6KY0jPjmmzdVKPXmdZ4w5048Oa0IyMEapK6eO9YUUZbziA3fUNw==",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "96c61fea-07a1-4578-a8e0-4d3571e5c956",
+  "persistent" : true,
+  "insertionIndex" : 130
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-9a6d9082-7084-4988-81b7-e468c69643b1.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-9a6d9082-7084-4988-81b7-e468c69643b1.json
new file mode 100644
index 00000000..2b41c9c9
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-9a6d9082-7084-4988-81b7-e468c69643b1.json
@@ -0,0 +1,43 @@
+{
+  "id" : "9a6d9082-7084-4988-81b7-e468c69643b1",
+  "name" : "btql",
+  "request" : {
+    "url" : "/btql",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"query\":\"select: span_id, span_parents, root_span_id, name | from: project_logs('6ae68365-7620-4630-921b-bac416634fc8') | filter: root_span_id = '49e7ed385154a29ec94b1e5c3cd89a0d'\"}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "btql-9a6d9082-7084-4988-81b7-e468c69643b1.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNTeFwxIAMEPvA=",
+      "vary" : "Origin",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "x-bt-brainstore-duration-ms" : "111",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c27c-5ab4032a0f593abf39990d1a;Parent=6aaf0197d3e91c5f;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "196",
+      "Date" : "Wed, 08 Apr 2026 21:02:52 GMT",
+      "Via" : "1.1 95a087e13956fc03ffaeeaec4faa051a.cloudfront.net (CloudFront), 1.1 ddea1c07643e5e0bfceb34480eebdc52.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c27c0000000024fd0dc637721fc2",
+      "x-amzn-RequestId" : "2d9b9145-6abe-4a60-a6e0-ff1b77939df8",
+      "X-Amz-Cf-Id" : "xhBDrvhsg1m7Q7zy28jJQsi3XOkyQlfK8UWqzTXL0batZWkI0GMXtw==",
+      "x-bt-cursor" : "adbCe+CWAAA",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "9a6d9082-7084-4988-81b7-e468c69643b1",
+  "persistent" : true,
+  "insertionIndex" : 15
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-a74c0fbe-db4f-4050-81d2-56ba6660570f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-a74c0fbe-db4f-4050-81d2-56ba6660570f.json
new file mode 100644
index 00000000..02efba51
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@@ -0,0 +1,42 @@
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new file mode 100644
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new file mode 100644
index 00000000..de4894ee
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@@ -0,0 +1,42 @@
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new file mode 100644
index 00000000..5b48e3e7
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@@ -0,0 +1,44 @@
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-cf97050d-fa31-4004-a751-7b25584f0de3.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/btql-cf97050d-fa31-4004-a751-7b25584f0de3.json
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@@ -0,0 +1,46 @@
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@@ -0,0 +1,42 @@
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+  "uuid" : "f495c0f6-4964-4dcc-a3c7-8973d2383946",
+  "persistent" : true,
+  "insertionIndex" : 113
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-011e1cb1-4854-4715-b330-4276c375c9cf.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-011e1cb1-4854-4715-b330-4276c375c9cf.json
new file mode 100644
index 00000000..12160f41
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-011e1cb1-4854-4715-b330-4276c375c9cf.json
@@ -0,0 +1,39 @@
+{
+  "id" : "011e1cb1-4854-4715-b330-4276c375c9cf",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhN1IFIwoAMEFLg=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c353-2c7284dc7d1c0b5b376f593d;Parent=4478c8e0e3b5a8b7;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:06:27 GMT",
+      "Via" : "1.1 b521abc69f4dd055f355de798c5fb95a.cloudfront.net (CloudFront), 1.1 74e8c76139b8c7f9b11d5e4441c2a7a2.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c353000000005f2c9a36bc9e5c9f",
+      "x-amzn-RequestId" : "c3690721-7f1c-40c8-b3a3-b78a5ad69cb4",
+      "X-Amz-Cf-Id" : "8qvf-DzL23JWPfJKPBlf61_Cua_vBh5z8Lmeb82CuRxUKUzqQV4a6Q==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "011e1cb1-4854-4715-b330-4276c375c9cf",
+  "persistent" : true,
+  "insertionIndex" : 153
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-04ba6e68-856e-4b10-b296-a4d9829eb95a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-04ba6e68-856e-4b10-b296-a4d9829eb95a.json
deleted file mode 100644
index 8dedd5af..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-04ba6e68-856e-4b10-b296-a4d9829eb95a.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "04ba6e68-856e-4b10-b296-a4d9829eb95a",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SFO53-P8", "SFO53-P1" ],
-      "Date" : "Wed, 04 Mar 2026 20:20:47 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "2fae1a22-8b3d-4007-b407-01961a751d1e",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a8941e000000003f6c62cd41a02bf2",
-      "x-amz-apigw-id" : "ZtwU3FEOoAMECwQ=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a8941e-63b9eed369e1ace54faef70b;Parent=6eb02788e9e68eb2;Sampled=0;Lineage=1:24be3d11:0",
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-      "X-Amz-Cf-Id" : "nEEgZNgyfbmwAFPyMRxiH_drpjzNumJAmIgMVbDvVck4MY6F3cjj2Q=="
-    }
-  },
-  "uuid" : "04ba6e68-856e-4b10-b296-a4d9829eb95a",
-  "persistent" : true,
-  "insertionIndex" : 106
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-07f3ba51-9124-43c0-9655-096f687a37e5.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-07f3ba51-9124-43c0-9655-096f687a37e5.json
new file mode 100644
index 00000000..796bea54
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-07f3ba51-9124-43c0-9655-096f687a37e5.json
@@ -0,0 +1,39 @@
+{
+  "id" : "07f3ba51-9124-43c0-9655-096f687a37e5",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNQ-GnWIAMEmRQ=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c26c-36dbe941107581631a66c040;Parent=118c7dd6e5f40128;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:36 GMT",
+      "Via" : "1.1 49e28fce48b0172be48e0ceea533547e.cloudfront.net (CloudFront), 1.1 a624be98cd5b264f373d8ac17f78ee50.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26c0000000004b398e3f5ca7c04",
+      "x-amzn-RequestId" : "7c86e063-ccf7-4c86-ab0c-3dac088b1490",
+      "X-Amz-Cf-Id" : "DUu_mb-P2uH0qeNDUOayohh9z_g-BRUO9HGxNsOIXy6oQALTIcSGQQ==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "07f3ba51-9124-43c0-9655-096f687a37e5",
+  "persistent" : true,
+  "insertionIndex" : 53
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-08b617f5-c0eb-4add-ab12-041c02da76fc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-08b617f5-c0eb-4add-ab12-041c02da76fc.json
deleted file mode 100644
index 9353c365..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-08b617f5-c0eb-4add-ab12-041c02da76fc.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "08b617f5-c0eb-4add-ab12-041c02da76fc",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
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-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:41:14 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "00145192-c4b5-4316-bd65-d84906b5afcd",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9ce4a00000000042e2aea0ee7b29b",
-      "x-amz-apigw-id" : "Zw0rpGtkoAMELhg=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9ce4a-458b4c292d18f02e7e7c633c;Parent=7e2b690dbee36aec;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 e1832834d17ab65dd955f4e68cc524e6.cloudfront.net (CloudFront), 1.1 87247d9a9b2f9e51b0c72b364948aefa.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "Jvu3S207wAfX4VeHTaonx6abk_WfqF5UxxkMj3tAsL4-HqPRIzuh4w=="
-    }
-  },
-  "uuid" : "08b617f5-c0eb-4add-ab12-041c02da76fc",
-  "persistent" : true,
-  "insertionIndex" : 132
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-09fb5b68-31ad-43b5-890d-7e3c4615a0a8.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-09fb5b68-31ad-43b5-890d-7e3c4615a0a8.json
new file mode 100644
index 00000000..7d86bd48
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-09fb5b68-31ad-43b5-890d-7e3c4615a0a8.json
@@ -0,0 +1,39 @@
+{
+  "id" : "09fb5b68-31ad-43b5-890d-7e3c4615a0a8",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNzVEMvIAMEksQ=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c348-5a00abd36f02fa764f669629;Parent=014fd240b30720f8;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:06:16 GMT",
+      "Via" : "1.1 2be627c4e85d6d9d9e32a7523e1b67ee.cloudfront.net (CloudFront), 1.1 0eb43913f9caf453beb959a8a836a688.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c348000000001eb9a665b9e0f972",
+      "x-amzn-RequestId" : "d58fc128-89e3-4585-84cc-ec5e8af16eae",
+      "X-Amz-Cf-Id" : "PQfFCnA_p_YS0KRPjqz9UFPx8dn_Uhgd2WNn3DyTeh205euReJomhg==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "09fb5b68-31ad-43b5-890d-7e3c4615a0a8",
+  "persistent" : true,
+  "insertionIndex" : 148
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-0b547a39-3f09-4099-b602-0e149a77610e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-0b547a39-3f09-4099-b602-0e149a77610e.json
deleted file mode 100644
index f4dceec9..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-0b547a39-3f09-4099-b602-0e149a77610e.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "0b547a39-3f09-4099-b602-0e149a77610e",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:28 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "e9c67196-fc2f-4b99-b09c-0da4bb3a028a",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549c300000000267ca15bb4b478e3",
-      "x-amz-apigw-id" : "Y9h2rFzfoAMEj9g=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549c3-36ed50a478571eac6ded70ea;Parent=2908fd938c68c9a9;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 2582fcc2e5a8f93a556ac3ef26738abc.cloudfront.net (CloudFront), 1.1 4ac8d091dce10e726cfc5404bfed72b8.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "g-eYov3ZTaCVI0FWyOCXp8N449Ou2idSjXjpoEdXVMwDt_MSnwPnQQ=="
-    }
-  },
-  "uuid" : "0b547a39-3f09-4099-b602-0e149a77610e",
-  "persistent" : true,
-  "insertionIndex" : 57
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-0e25b74f-5ac9-4bf8-8d05-a670c244e616.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-0e25b74f-5ac9-4bf8-8d05-a670c244e616.json
new file mode 100644
index 00000000..e764632c
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-0e25b74f-5ac9-4bf8-8d05-a670c244e616.json
@@ -0,0 +1,39 @@
+{
+  "id" : "0e25b74f-5ac9-4bf8-8d05-a670c244e616",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNYfGEroAMEFRw=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c29c-12fffcc37b661156339d5703;Parent=0d43374e61514a49;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:03:24 GMT",
+      "Via" : "1.1 b7e07d6a19a4c8b2e410e9c1e173548c.cloudfront.net (CloudFront), 1.1 82fa7f20ab5a12301da8e01f9493e222.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c29c000000002ec3c968c583fa30",
+      "x-amzn-RequestId" : "83b228bc-41fc-47dd-84ed-7c667b8c7721",
+      "X-Amz-Cf-Id" : "7cdqamBRC7-uuhJrnGkzddhMGMoRvleYU7hdMqjBjEievKJALMozxg==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "0e25b74f-5ac9-4bf8-8d05-a670c244e616",
+  "persistent" : true,
+  "insertionIndex" : 136
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-0ed09ca4-ea5c-41ed-a044-80008fbf0a45.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-0ed09ca4-ea5c-41ed-a044-80008fbf0a45.json
new file mode 100644
index 00000000..afc0c865
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-0ed09ca4-ea5c-41ed-a044-80008fbf0a45.json
@@ -0,0 +1,39 @@
+{
+  "id" : "0ed09ca4-ea5c-41ed-a044-80008fbf0a45",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNV0HkYoAMEPRQ=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c28b-2783574615ed63f9352be9d7;Parent=524524da2d1f9e86;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:03:07 GMT",
+      "Via" : "1.1 d5e9313fa5148ebdba4664d3e2a90f58.cloudfront.net (CloudFront), 1.1 ffe9646b2ea911744e2d51fc0715cedc.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c28b000000003f009338e4604b3b",
+      "x-amzn-RequestId" : "4a96d5ac-63fc-4539-8964-5fb18da43a4a",
+      "X-Amz-Cf-Id" : "5rtt0aXgSzELpxJTKeJHwUsH3XwzW6Yz-6zkBKFc5LWrPRP9xYuYZQ==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "0ed09ca4-ea5c-41ed-a044-80008fbf0a45",
+  "persistent" : true,
+  "insertionIndex" : 139
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-10f21206-044c-41b0-be5e-a8985ebed935.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-10f21206-044c-41b0-be5e-a8985ebed935.json
deleted file mode 100644
index 94b90578..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-10f21206-044c-41b0-be5e-a8985ebed935.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "10f21206-044c-41b0-be5e-a8985ebed935",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-11e893ac-629b-48c3-b339-9c10b3f426e6.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-11e893ac-629b-48c3-b339-9c10b3f426e6.json
deleted file mode 100644
index 61428d93..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-11e893ac-629b-48c3-b339-9c10b3f426e6.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
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-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-17681b39-34a2-4c2d-a53f-8d060139cf03.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-17681b39-34a2-4c2d-a53f-8d060139cf03.json
deleted file mode 100644
index 301672b1..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-17681b39-34a2-4c2d-a53f-8d060139cf03.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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-  "name" : "otel_v1_traces",
-  "request" : {
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-1d1288a6-581d-4a46-8194-4d81acc38c95.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-1d1288a6-581d-4a46-8194-4d81acc38c95.json
new file mode 100644
index 00000000..74dbcd82
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-1d1288a6-581d-4a46-8194-4d81acc38c95.json
@@ -0,0 +1,39 @@
+{
+  "id" : "1d1288a6-581d-4a46-8194-4d81acc38c95",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
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+    "bodyPatterns" : [ {
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+  },
+  "response" : {
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+    "headers" : {
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+      "x-amz-apigw-id" : "bhNQFGJCoAMESiQ=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
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+      "x-bt-internal-trace-id" : "69d6c26600000000433e24d9eeaf7557",
+      "x-amzn-RequestId" : "3cc43dc9-7c35-42a0-930c-4a846f8ac4cf",
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+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "1d1288a6-581d-4a46-8194-4d81acc38c95",
+  "persistent" : true,
+  "insertionIndex" : 69
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-1f56b82a-09ec-4399-84b1-daf0a596da46.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-1f56b82a-09ec-4399-84b1-daf0a596da46.json
deleted file mode 100644
index b1d801e5..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-1f56b82a-09ec-4399-84b1-daf0a596da46.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "1f56b82a-09ec-4399-84b1-daf0a596da46",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
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-    "headers" : {
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-1f5ca854-23f3-4c0b-a654-952c3f3c857c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-1f5ca854-23f3-4c0b-a654-952c3f3c857c.json
deleted file mode 100644
index 6de4a86c..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-1f5ca854-23f3-4c0b-a654-952c3f3c857c.json
+++ /dev/null
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-{
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-243e5745-1f02-42d0-9e1a-5d2bba6776ca.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-243e5745-1f02-42d0-9e1a-5d2bba6776ca.json
new file mode 100644
index 00000000..ab303f85
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-243e5745-1f02-42d0-9e1a-5d2bba6776ca.json
@@ -0,0 +1,39 @@
+{
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+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
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+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNPOG54oAMEgPQ=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c261-647a2e500dbbbf0e40571ad2;Parent=017961fb768381b5;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:25 GMT",
+      "Via" : "1.1 2be627c4e85d6d9d9e32a7523e1b67ee.cloudfront.net (CloudFront), 1.1 b669d9add7767f73665f1f8b7e8cd802.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26100000000045d8799560d5531",
+      "x-amzn-RequestId" : "ae8e9b56-7d79-4bae-abc8-15700f44b92a",
+      "X-Amz-Cf-Id" : "7J-A1zkpXlrBoTyHJ-ODRFitb4RxJQwkecQaFfUJpIf8WY6CF1_vHw==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "243e5745-1f02-42d0-9e1a-5d2bba6776ca",
+  "persistent" : true,
+  "insertionIndex" : 80
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-24796634-260b-49b0-8ca1-e8c0dd1441e2.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-24796634-260b-49b0-8ca1-e8c0dd1441e2.json
new file mode 100644
index 00000000..d134b868
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-24796634-260b-49b0-8ca1-e8c0dd1441e2.json
@@ -0,0 +1,39 @@
+{
+  "id" : "24796634-260b-49b0-8ca1-e8c0dd1441e2",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNOuGkMIAMEliw=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c25d-1e146042606d9408228f796b;Parent=2e0e8cad95e8a7de;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:22 GMT",
+      "Via" : "1.1 b7e07d6a19a4c8b2e410e9c1e173548c.cloudfront.net (CloudFront), 1.1 a53bab1af200813b8f27e3c0a28b4964.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c25d00000000088c6574cb0edbaf",
+      "x-amzn-RequestId" : "9ea53408-d030-416c-a420-48a0dbb1eac0",
+      "X-Amz-Cf-Id" : "1vceFeeYDKm_DSVIX14m3aOxRVv4HidhWHZ5CxpaDY7FUpYdHV1hqg==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "24796634-260b-49b0-8ca1-e8c0dd1441e2",
+  "persistent" : true,
+  "insertionIndex" : 87
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-24991103-5e15-48e3-b494-afa4ed0381ec.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-24991103-5e15-48e3-b494-afa4ed0381ec.json
deleted file mode 100644
index c846b89b..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-24991103-5e15-48e3-b494-afa4ed0381ec.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "24991103-5e15-48e3-b494-afa4ed0381ec",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
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new file mode 100644
index 00000000..8c1449e6
--- /dev/null
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@@ -0,0 +1,39 @@
+{
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+  "name" : "otel_v1_traces",
+  "request" : {
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+    "method" : "POST",
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+  "insertionIndex" : 2
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-257bf382-a2d2-4d57-ae05-223870928d40.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-257bf382-a2d2-4d57-ae05-223870928d40.json
deleted file mode 100644
index 459057bc..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-257bf382-a2d2-4d57-ae05-223870928d40.json
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-25d130bf-c522-4329-afbf-6b6b7259a752.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-25d130bf-c522-4329-afbf-6b6b7259a752.json
new file mode 100644
index 00000000..3258c08b
--- /dev/null
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@@ -0,0 +1,39 @@
+{
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+  "request" : {
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+}
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-27ac352d-2a5b-4b1e-bf64-3fcd82933eae.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-27ac352d-2a5b-4b1e-bf64-3fcd82933eae.json
deleted file mode 100644
index b46a148f..00000000
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+++ /dev/null
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-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "X-Cache" : "Miss from cloudfront",
-      "x-amz-apigw-id" : "atnX-GAJIAMECsA=",
-      "vary" : "Origin",
-      "x-amzn-Remapped-content-length" : "0",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "X-Amzn-Trace-Id" : "Root=1-69c21f65-04d275353acd34cf600ba485;Parent=45747fdbd4d274f5;Sampled=0;Lineage=1:24be3d11:0",
-      "Date" : "Tue, 24 Mar 2026 05:21:42 GMT",
-      "Via" : "1.1 59e4792b9d6184bfa491a317b36590d2.cloudfront.net (CloudFront), 1.1 ee5f8da78d4211a93c9dba8864a4067e.cloudfront.net (CloudFront)",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "access-control-allow-credentials" : "true",
-      "x-bt-internal-trace-id" : "69c21f65000000000e5ed4219c5ab05b",
-      "x-amzn-RequestId" : "2cad0a30-19d4-414f-98d1-1be66b340f45",
-      "X-Amz-Cf-Id" : "mJ6OfPXdSubdJ9rfIiHmQVUPcJq-Mn4gKRFnWNc0dfnbJ_J7DdN5GA==",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "Content-Type" : "application/x-protobuf"
-    }
-  },
-  "uuid" : "27ac352d-2a5b-4b1e-bf64-3fcd82933eae",
-  "persistent" : true,
-  "insertionIndex" : 142
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-280b119b-97a6-4689-b660-9d7c32ca5ba4.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-280b119b-97a6-4689-b660-9d7c32ca5ba4.json
new file mode 100644
index 00000000..803c7e4f
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-280b119b-97a6-4689-b660-9d7c32ca5ba4.json
@@ -0,0 +1,39 @@
+{
+  "id" : "280b119b-97a6-4689-b660-9d7c32ca5ba4",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : 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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNb8HxdIAMEgPQ=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2b2-206236ff372835cf4eadb844;Parent=18a03030ad56d2c5;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:03:46 GMT",
+      "Via" : "1.1 724581b48d733e53834b535d2a623034.cloudfront.net (CloudFront), 1.1 82fa7f20ab5a12301da8e01f9493e222.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2b2000000002870739896bd811b",
+      "x-amzn-RequestId" : "39ab4390-2057-4369-8850-bcd4daaea0fc",
+      "X-Amz-Cf-Id" : "wvPM7GlmEOD38uxHVvoAph4ijWZ2zZnUY5o-uiUE9awpxDaHTrQAOg==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "280b119b-97a6-4689-b660-9d7c32ca5ba4",
+  "persistent" : true,
+  "insertionIndex" : 131
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-28e35fa4-19dd-4fc6-8afe-692d40550b77.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-28e35fa4-19dd-4fc6-8afe-692d40550b77.json
deleted file mode 100644
index dd3eee8d..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-28e35fa4-19dd-4fc6-8afe-692d40550b77.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "28e35fa4-19dd-4fc6-8afe-692d40550b77",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:02 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "88f20184-c186-4f9c-b02d-c0de87b06640",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549aa0000000067c5fc1f922f669e",
-      "x-amz-apigw-id" : "Y9hyrGrpIAMEsYA=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
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-  "persistent" : true,
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-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-2afb2972-0d1e-4792-96fd-6a12e3524961.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-2afb2972-0d1e-4792-96fd-6a12e3524961.json
new file mode 100644
index 00000000..34501e03
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-2afb2972-0d1e-4792-96fd-6a12e3524961.json
@@ -0,0 +1,39 @@
+{
+  "id" : "2afb2972-0d1e-4792-96fd-6a12e3524961",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNvbF0moAMER2g=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c32f-34111e052990b9f510dbf3a5;Parent=27d9bd02d716657a;Sampled=0;Lineage=1:24be3d11:0",
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+      "Via" : "1.1 b521abc69f4dd055f355de798c5fb95a.cloudfront.net (CloudFront), 1.1 65f2e9f7f1475de54aa452d3ceb9bcf6.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c32f0000000039119316dad7ef48",
+      "x-amzn-RequestId" : "62345d7b-4f11-4171-9b8c-e5a35265ff31",
+      "X-Amz-Cf-Id" : "gyatPxGFNE2XiKmntQ5PitO5ggsxdjcnk2zIVmYAcsNwGPZkS3jSHA==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "2afb2972-0d1e-4792-96fd-6a12e3524961",
+  "persistent" : true,
+  "insertionIndex" : 144
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-2bb3d8b2-3d45-497b-9a9c-c0ce54081fe0.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-2bb3d8b2-3d45-497b-9a9c-c0ce54081fe0.json
deleted file mode 100644
index 8a506b2e..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-2bb3d8b2-3d45-497b-9a9c-c0ce54081fe0.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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-  "name" : "otel_v1_traces",
-  "request" : {
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-    "headers" : {
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-  },
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-    "headers" : {
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-      "x-bt-internal-trace-id" : "69a9ce4c000000005bd45a378f604a4f",
-      "x-amz-apigw-id" : "Zw0sCEtNoAMEBHA=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9ce4c-402777976cc1d4d63152bfb7;Parent=6f74be08351d1f9f;Sampled=0;Lineage=1:24be3d11:0",
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-  "uuid" : "2bb3d8b2-3d45-497b-9a9c-c0ce54081fe0",
-  "persistent" : true,
-  "insertionIndex" : 134
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-2e318708-ffb9-4fcc-a54d-5e516a54f988.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-2e318708-ffb9-4fcc-a54d-5e516a54f988.json
deleted file mode 100644
index 73bc0889..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-2e318708-ffb9-4fcc-a54d-5e516a54f988.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "2e318708-ffb9-4fcc-a54d-5e516a54f988",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
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-    "bodyPatterns" : [ {
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-  "response" : {
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-    "headers" : {
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-      "vary" : "Origin",
-      "x-amzn-Remapped-content-length" : "0",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "X-Amzn-Trace-Id" : "Root=1-69c21f6d-08561cf370ea22d51b127abd;Parent=40f4aa3d99232162;Sampled=0;Lineage=1:24be3d11:0",
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-      "access-control-allow-credentials" : "true",
-      "x-bt-internal-trace-id" : "69c21f6d000000007459b139a87ad8e4",
-      "x-amzn-RequestId" : "dbedc5e4-b208-4165-8140-0053be850974",
-      "X-Amz-Cf-Id" : "LoiTuirlYqghCyprzBx3aDb4xpL46w4FOWyQ2-hIaNQ3t90SYiZsaQ==",
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-      "Content-Type" : "application/x-protobuf"
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-  },
-  "uuid" : "2e318708-ffb9-4fcc-a54d-5e516a54f988",
-  "persistent" : true,
-  "insertionIndex" : 138
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-38669047-1185-4f6d-b479-72a7eb2e7942.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-38669047-1185-4f6d-b479-72a7eb2e7942.json
deleted file mode 100644
index dedf88a0..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-38669047-1185-4f6d-b479-72a7eb2e7942.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "38669047-1185-4f6d-b479-72a7eb2e7942",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:23 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "1d9eb159-a21a-45a6-b933-ee3070e7529f",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549be000000003b37d25283580ee9",
-      "x-amz-apigw-id" : "Y9h13H28IAMEO1w=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549be-6100eb137fc96c4d36c3a558;Parent=47fa4ad700e24966;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 940972e9e344075576fe20d5db482122.cloudfront.net (CloudFront), 1.1 d525041695bdb6325f78ebba5c11b8a2.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "yyANisjqpNBED3h3a_es7dzlzGu8c7_c9lgwfkvyjss6FY7sf5pG_g=="
-    }
-  },
-  "uuid" : "38669047-1185-4f6d-b479-72a7eb2e7942",
-  "persistent" : true,
-  "insertionIndex" : 44
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-3b281011-14e1-453e-8ff0-d1637fb2aad1.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-3b281011-14e1-453e-8ff0-d1637fb2aad1.json
new file mode 100644
index 00000000..a2831ba5
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-3b281011-14e1-453e-8ff0-d1637fb2aad1.json
@@ -0,0 +1,39 @@
+{
+  "id" : "3b281011-14e1-453e-8ff0-d1637fb2aad1",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNR4H36oAMEaRA=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c272-6b130fba768a03d76d07b086;Parent=392d2019637dcafe;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:42 GMT",
+      "Via" : "1.1 49e28fce48b0172be48e0ceea533547e.cloudfront.net (CloudFront), 1.1 da32b45f2cc22dc818960285c4e91b66.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c272000000002ed6a2f5b6a96b33",
+      "x-amzn-RequestId" : "7e7ccb91-026b-4490-aa69-6959142c311f",
+      "X-Amz-Cf-Id" : "yDCdxMWye319GFdgP6VxxdNAG2VAW_t_uA3TN_z7jVAI5gPOOpK6vQ==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "3b281011-14e1-453e-8ff0-d1637fb2aad1",
+  "persistent" : true,
+  "insertionIndex" : 38
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-41549fb6-299f-4f8b-bb40-4782a27f21c5.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-41549fb6-299f-4f8b-bb40-4782a27f21c5.json
deleted file mode 100644
index 69bd96a4..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-41549fb6-299f-4f8b-bb40-4782a27f21c5.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "41549fb6-299f-4f8b-bb40-4782a27f21c5",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SFO53-P8", "SFO53-P1" ],
-      "Date" : "Wed, 04 Mar 2026 20:20:48 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "d6168b0d-1e1a-4bb1-8587-b3ddbb33e066",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a894200000000070d5d4f79be2a868",
-      "x-amz-apigw-id" : "ZtwVEFEaoAMEY9g=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a89420-445203300ae3a0f016b0c69e;Parent=5d7c1a8d749c5ac5;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 f38dffa5f68963b42a7e9d52afc9ea08.cloudfront.net (CloudFront), 1.1 e254430e2f05073f8b60d988c9070962.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "cqo_ALL8Qiop0-ZtoVjZVqhUIE74d-Bu28BOsDLW58OL5KSErlNNAQ=="
-    }
-  },
-  "uuid" : "41549fb6-299f-4f8b-bb40-4782a27f21c5",
-  "persistent" : true,
-  "insertionIndex" : 107
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-41cf277b-e997-458b-9834-21ce460e60f0.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-41cf277b-e997-458b-9834-21ce460e60f0.json
new file mode 100644
index 00000000..67ecc1a5
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-41cf277b-e997-458b-9834-21ce460e60f0.json
@@ -0,0 +1,39 @@
+{
+  "id" : "41cf277b-e997-458b-9834-21ce460e60f0",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNwWGrMIAMEddA=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c335-6ea278a804bf953b7e19041e;Parent=4ae6a2154ed48e94;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:05:57 GMT",
+      "Via" : "1.1 5d1052cca98b3bf996fd05529bc2e070.cloudfront.net (CloudFront), 1.1 ee5f8da78d4211a93c9dba8864a4067e.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c335000000002137e410bac88e8d",
+      "x-amzn-RequestId" : "e7ddfb57-70a0-4c32-9118-7211443dacbf",
+      "X-Amz-Cf-Id" : "heGI2u9TmMgWo7CAMpebWTs2MHo9bOBXmnqJKH9V9RRJPP5YV64v_A==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "41cf277b-e997-458b-9834-21ce460e60f0",
+  "persistent" : true,
+  "insertionIndex" : 140
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-45a6a104-3e21-4c79-9155-9d2c8439f6b6.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-45a6a104-3e21-4c79-9155-9d2c8439f6b6.json
deleted file mode 100644
index 65722e5d..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-45a6a104-3e21-4c79-9155-9d2c8439f6b6.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "45a6a104-3e21-4c79-9155-9d2c8439f6b6",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
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-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:37:48 GMT",
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-      "x-bt-internal-trace-id" : "69a9cd7b0000000008924f66545d5ac6",
-      "x-amz-apigw-id" : "Zw0LbGMvIAMEdeg=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
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-    }
-  },
-  "uuid" : "45a6a104-3e21-4c79-9155-9d2c8439f6b6",
-  "persistent" : true,
-  "insertionIndex" : 129
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-466d1cb2-3345-43b6-9eca-c42dcf21f052.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-466d1cb2-3345-43b6-9eca-c42dcf21f052.json
new file mode 100644
index 00000000..fd9558b4
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-466d1cb2-3345-43b6-9eca-c42dcf21f052.json
@@ -0,0 +1,39 @@
+{
+  "id" : "466d1cb2-3345-43b6-9eca-c42dcf21f052",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "CuACCrIBCiAKDHNlcnZpY2UubmFtZRIQCg5icmFpbnRydXN0LWFwcAoiCg9zZXJ2aWNlLnZlcnNpb24SDwoNMC4zLjAtMWMwNGFmMAogChZ0ZWxlbWV0cnkuc2RrLmxhbmd1YWdlEgYKBGphdmEKJQoSdGVsZW1ldHJ5LnNkay5uYW1lEg8KDW9wZW50ZWxlbWV0cnkKIQoVdGVsZW1ldHJ5LnNkay52ZXJzaW9uEggKBjEuNTkuMBKoAQoYChZkaXN0cmlidXRlZC10cmFjZS10ZXN0EosBChBJ5+04UVSinslLHlw82JoNEgglulck7UTPPSoddGVzdC1kaXN0cmlidXRlZC10cmFjZS1wYXJlbnQwATnqS6Rxhn2kGEFwj3T1hn2kGEoyChFicmFpbnRydXN0LnBhcmVudBIdChtwcm9qZWN0X25hbWU6amF2YS11bml0LXRlc3R6AIUBAQEAAA=="
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNTZEe1oAMErhA=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c27b-27645e560538a83c50d28aa7;Parent=6e6da7edb861a893;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:51 GMT",
+      "Via" : "1.1 724581b48d733e53834b535d2a623034.cloudfront.net (CloudFront), 1.1 ffe9646b2ea911744e2d51fc0715cedc.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c27b00000000297ce67268fcfbfa",
+      "x-amzn-RequestId" : "cc5d0940-57c5-4d3a-8db4-c21d8c6b7497",
+      "X-Amz-Cf-Id" : "elciWfIffadrh_faGnqKdHZLs6hR3IwF6rehpPNTPn4w5TfG-wcv_Q==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "466d1cb2-3345-43b6-9eca-c42dcf21f052",
+  "persistent" : true,
+  "insertionIndex" : 16
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-48a52dd8-c9eb-4da0-9c37-81765bb837b0.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-48a52dd8-c9eb-4da0-9c37-81765bb837b0.json
new file mode 100644
index 00000000..4080754d
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-48a52dd8-c9eb-4da0-9c37-81765bb837b0.json
@@ -0,0 +1,39 @@
+{
+  "id" : "48a52dd8-c9eb-4da0-9c37-81765bb837b0",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
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+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
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+      "x-amz-apigw-id" : "bhNzNHASIAMEi1Q=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c347-6dbb2b871e2c7f8115647f57;Parent=0e92fb42028e7dfa;Sampled=0;Lineage=1:24be3d11:0",
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+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c347000000007b561f2ebfb0de2e",
+      "x-amzn-RequestId" : "c8601cdc-b39f-4181-b706-ea25a9342356",
+      "X-Amz-Cf-Id" : "DK4AyzMRBjdRWHdoawQqLn8vu0DDu2LHhtVFOIAd7OFjOW1Z1NH30g==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "48a52dd8-c9eb-4da0-9c37-81765bb837b0",
+  "persistent" : true,
+  "insertionIndex" : 149
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-499535c9-14cf-4285-9008-2dc5bf52b060.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-499535c9-14cf-4285-9008-2dc5bf52b060.json
new file mode 100644
index 00000000..ef3995e7
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-499535c9-14cf-4285-9008-2dc5bf52b060.json
@@ -0,0 +1,39 @@
+{
+  "id" : "499535c9-14cf-4285-9008-2dc5bf52b060",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNRYFiaIAMEGng=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c26e-6460090d148b234312b37d20;Parent=485bd1fdc28e4cc1;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:39 GMT",
+      "Via" : "1.1 db84db36e16ca0c80b0992006d731900.cloudfront.net (CloudFront), 1.1 83d24992402f7b214901ab76fbdc11e2.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26e0000000020e08d84d8463b07",
+      "x-amzn-RequestId" : "0c6d866e-53cf-405d-b7e2-1e94db70eb3e",
+      "X-Amz-Cf-Id" : "zw8dvZ4zbzAZMHMX7HxIzOtScoTO6lklBf0hEPAk-CmQOJ5wHtfkVw==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "499535c9-14cf-4285-9008-2dc5bf52b060",
+  "persistent" : true,
+  "insertionIndex" : 46
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-4fc40df7-b1c5-4a5e-8079-b4c3cb1cc2b7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-4fc40df7-b1c5-4a5e-8079-b4c3cb1cc2b7.json
deleted file mode 100644
index e392ca3a..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-4fc40df7-b1c5-4a5e-8079-b4c3cb1cc2b7.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "4fc40df7-b1c5-4a5e-8079-b4c3cb1cc2b7",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:41:15 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "135c57fc-337e-42ea-a764-f3a1cfd2ae33",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9ce4b000000001016b14b178ea49c",
-      "x-amz-apigw-id" : "Zw0r1GSzoAMEchQ=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9ce4b-766d4df70677235914347e34;Parent=08b3a53bcc3899d8;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 487082619948f670d3b30fb3db8fbabc.cloudfront.net (CloudFront), 1.1 170efbc424be9181bda5d0fcd6e41f30.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "HEg-B2cROwxT33q-PRDZ1e1hQQJ_dz9rBY_dfGh6iEL0J7pksomAKA=="
-    }
-  },
-  "uuid" : "4fc40df7-b1c5-4a5e-8079-b4c3cb1cc2b7",
-  "persistent" : true,
-  "insertionIndex" : 133
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-54cae228-050e-4747-81c7-6cbfa190fc76.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-54cae228-050e-4747-81c7-6cbfa190fc76.json
deleted file mode 100644
index 0daf8a9e..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-54cae228-050e-4747-81c7-6cbfa190fc76.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "54cae228-050e-4747-81c7-6cbfa190fc76",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:37:50 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "6c1da751-cd35-4758-846b-0393db3d56f6",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9cd7e00000000544fea78c68a666f",
-      "x-amz-apigw-id" : "Zw0L1G_QIAMEmhQ=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9cd7e-43d00e5115456dc925e783f9;Parent=1dae4b85b4e23f84;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 20b3731a0ef4aba3db1fcd63c3ef2b2a.cloudfront.net (CloudFront), 1.1 82fa7f20ab5a12301da8e01f9493e222.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "La_-o8sJM8lh2D6cgAyWF64L1xj5OnPW0UZLk3joxhvIMLDfTZjmwg=="
-    }
-  },
-  "uuid" : "54cae228-050e-4747-81c7-6cbfa190fc76",
-  "persistent" : true,
-  "insertionIndex" : 131
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-54d2a882-99c1-488d-90dc-0462c14ab267.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-54d2a882-99c1-488d-90dc-0462c14ab267.json
new file mode 100644
index 00000000..7b85ecf2
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-54d2a882-99c1-488d-90dc-0462c14ab267.json
@@ -0,0 +1,39 @@
+{
+  "id" : "54d2a882-99c1-488d-90dc-0462c14ab267",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNv8FyxIAMEliw=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c332-4e6a2f07337eb63d292d675d;Parent=48d958b9d58d9982;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:05:54 GMT",
+      "Via" : "1.1 d118b2ea8414d381f46f91331ab67f02.cloudfront.net (CloudFront), 1.1 65f2e9f7f1475de54aa452d3ceb9bcf6.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c3320000000041351ab1f5c486e5",
+      "x-amzn-RequestId" : "6e11b7fb-c075-4138-973f-69ac5bc8d25b",
+      "X-Amz-Cf-Id" : "lb489ZtPMQU6XCgFgmSr8dlq9qaQ4N4GA0Hqd-9IY4xGjf22axWNlw==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "54d2a882-99c1-488d-90dc-0462c14ab267",
+  "persistent" : true,
+  "insertionIndex" : 142
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-552715c6-64c7-438f-b76a-e09ea52dc1dd.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-552715c6-64c7-438f-b76a-e09ea52dc1dd.json
deleted file mode 100644
index d465cb34..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-552715c6-64c7-438f-b76a-e09ea52dc1dd.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "552715c6-64c7-438f-b76a-e09ea52dc1dd",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-59a6603c-d3c7-45be-a804-ec799c810646.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-59a6603c-d3c7-45be-a804-ec799c810646.json
new file mode 100644
index 00000000..8b66b629
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-59a6603c-d3c7-45be-a804-ec799c810646.json
@@ -0,0 +1,39 @@
+{
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+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
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+}
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-5b52d206-fff7-48e2-92ef-15476c7a3d9e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-5b52d206-fff7-48e2-92ef-15476c7a3d9e.json
deleted file mode 100644
index 6c6c9b16..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-5b52d206-fff7-48e2-92ef-15476c7a3d9e.json
+++ /dev/null
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-5db6cc88-6ee0-4532-9990-9c5e435efc9f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-5db6cc88-6ee0-4532-9990-9c5e435efc9f.json
deleted file mode 100644
index f4f00850..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-5db6cc88-6ee0-4532-9990-9c5e435efc9f.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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-  "request" : {
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-5fd4255c-167c-4244-877a-42137be04aba.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-5fd4255c-167c-4244-877a-42137be04aba.json
new file mode 100644
index 00000000..f5faf9c4
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-5fd4255c-167c-4244-877a-42137be04aba.json
@@ -0,0 +1,39 @@
+{
+  "id" : "5fd4255c-167c-4244-877a-42137be04aba",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
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+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhN3OE7FoAMEF0Q=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c361-3d31762b17aa5132343969ed;Parent=585eeb26d660ccaf;Sampled=0;Lineage=1:24be3d11:0",
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+      "Via" : "1.1 2c24d855455b80190edd9e2dcdca3ee8.cloudfront.net (CloudFront), 1.1 ee5f8da78d4211a93c9dba8864a4067e.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c36100000000585754be43cfefae",
+      "x-amzn-RequestId" : "ecea8885-9fab-49da-94c4-cad29524911d",
+      "X-Amz-Cf-Id" : "SW5kR6Qwl8j1MjJh-DOSjlSX-COATqAjUlBYvLMVwrQxDe0fT3T5bg==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "5fd4255c-167c-4244-877a-42137be04aba",
+  "persistent" : true,
+  "insertionIndex" : 159
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-62561358-8498-4f7e-9e6c-0745a358a9bc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-62561358-8498-4f7e-9e6c-0745a358a9bc.json
deleted file mode 100644
index 1d0e524a..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-62561358-8498-4f7e-9e6c-0745a358a9bc.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-64080a12-41b3-4a05-8f91-f6659445c060.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-64080a12-41b3-4a05-8f91-f6659445c060.json
new file mode 100644
index 00000000..05b28d25
--- /dev/null
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@@ -0,0 +1,39 @@
+{
+  "id" : "64080a12-41b3-4a05-8f91-f6659445c060",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
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+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNWuEHcIAMEJFw=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c291-72783edc5117ad9d3409bd45;Parent=3156fb5ffc229b3e;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:03:13 GMT",
+      "Via" : "1.1 8e6c2cf5874f5e4093136cc3de4d856a.cloudfront.net (CloudFront), 1.1 82fa7f20ab5a12301da8e01f9493e222.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c291000000006c44b03b576eecc8",
+      "x-amzn-RequestId" : "da7f6538-c96f-4aa7-a8c9-9353291395a5",
+      "X-Amz-Cf-Id" : "wtQngrUOiONEDPBmIKbBCDFyqIn4P2WI2nYPdNwxowJxadx8pLswtw==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "64080a12-41b3-4a05-8f91-f6659445c060",
+  "persistent" : true,
+  "insertionIndex" : 138
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6421fda1-021a-41ab-a9ac-ce6bcbb87707.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6421fda1-021a-41ab-a9ac-ce6bcbb87707.json
deleted file mode 100644
index 6f6ab5b1..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6421fda1-021a-41ab-a9ac-ce6bcbb87707.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "6421fda1-021a-41ab-a9ac-ce6bcbb87707",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "CscJCrgBCiAKDHNlcnZpY2UubmFtZRIQCg5icmFpbnRydXN0LWFwcAooCg9zZXJ2aWNlLnZlcnNpb24SFQoTMC4yLjUtMTBhOTMyNi1ESVJUWQogChZ0ZWxlbWV0cnkuc2RrLmxhbmd1YWdlEgYKBGphdmEKJQoSdGVsZW1ldHJ5LnNkay5uYW1lEg8KDW9wZW50ZWxlbWV0cnkKIQoVdGVsZW1ldHJ5LnNkay52ZXJzaW9uEggKBjEuNTQuMRKJCAowCiBpby5vcGVudGVsZW1ldHJ5Lm9wZW5haS1qYXZhLTEuMRIMMi4xOS4wLWFscGhhEtQHChD1cSJpuIKxK8Lc9MFQw38SEgje7FUJ+DEhPyoPQ2hhdCBDb21wbGV0aW9uMAE5R9G9liU/lRhBGZraxyU/lRhKHwoVZ2VuX2FpLm9wZXJhdGlvbi5uYW1lEgYKBGNoYXRKLAoeZ2VuX2FpLnJlc3BvbnNlLmZpbmlzaF9yZWFzb25zEgoqCAoGCgRzdG9wSigKHGJyYWludHJ1c3QubWV0YWRhdGEucHJvdmlkZXISCAoGb3BlbmFpSicKGmdlbl9haS5yZXF1ZXN0LnRlbXBlcmF0dXJlEgkhAAAAAAAAAABKPgoSZ2VuX2FpLnJlc3BvbnNlLmlkEigKJmNoYXRjbXBsLURBVTd2aWpqQ1BOcGJiWUc1Q0o4SXVMT3Z0M3FRSiAKGmdlbl9haS51c2FnZS5vdXRwdXRfdG9rZW5zEgIYB0oZCg1nZW5fYWkuc3lzdGVtEggKBm9wZW5haUqPAQoWZ2VuX2FpLm91dHB1dC5tZXNzYWdlcxJ1CnNbeyJyb2xlIjoiYXNzaXN0YW50IiwicGFydHMiOlt7InR5cGUiOiJ0ZXh0IiwiY29udGVudCI6IlRoZSBjYXBpdGFsIG9mIEZyYW5jZSBpcyBQYXJpcy4ifV0sImZpbmlzaF9yZWFzb24iOiJzdG9wIn1dSiUKFGdlbl9haS5yZXF1ZXN0Lm1vZGVsEg0KC2dwdC00by1taW5pSjMKJmJyYWludHJ1c3QubWV0cmljcy50aW1lX3RvX2ZpcnN0X3Rva2VuEgkhQl8X0bio6D9KHwoZZ2VuX2FpLnVzYWdlLmlucHV0X3Rva2VucxICGBdKxwEKFWdlbl9haS5pbnB1dC5tZXNzYWdlcxKtAQqqAVt7InJvbGUiOiJzeXN0ZW0iLCJwYXJ0cyI6W3sidHlwZSI6InRleHQiLCJjb250ZW50IjoiWW91IGFyZSBhIGhlbHBmdWwgYXNzaXN0YW50In1dfSx7InJvbGUiOiJ1c2VyIiwicGFydHMiOlt7InR5cGUiOiJ0ZXh0IiwiY29udGVudCI6IldoYXQgaXMgdGhlIGNhcGl0YWwgb2YgRnJhbmNlPyJ9XX1dSjIKEWJyYWludHJ1c3QucGFyZW50Eh0KG3Byb2plY3RfbmFtZTpqYXZhLXVuaXQtdGVzdEoxChVnZW5fYWkucmVzcG9uc2UubW9kZWwSGAoWZ3B0LTRvLW1pbmktMjAyNC0wNy0xOEoqChlicmFpbnRydXN0Lm1ldGFkYXRhLm1vZGVsEg0KC2dwdC00by1taW5pegCFAQEBAAA="
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6854eb54-eb40-45d4-adcb-364db512767e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6854eb54-eb40-45d4-adcb-364db512767e.json
deleted file mode 100644
index 8e241c6f..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6854eb54-eb40-45d4-adcb-364db512767e.json
+++ /dev/null
@@ -1,39 +0,0 @@
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-69a9c81e-30ec-49c4-ad1a-e1962184280f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-69a9c81e-30ec-49c4-ad1a-e1962184280f.json
deleted file mode 100644
index 063d7706..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-69a9c81e-30ec-49c4-ad1a-e1962184280f.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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-  "name" : "otel_v1_traces",
-  "request" : {
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-69d8944a-62b4-4aa4-99eb-07bb05ec277f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-69d8944a-62b4-4aa4-99eb-07bb05ec277f.json
deleted file mode 100644
index b3a62eb9..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-69d8944a-62b4-4aa4-99eb-07bb05ec277f.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6e3bf0b3-a42c-4817-86ad-34b2a0629d66.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6e3bf0b3-a42c-4817-86ad-34b2a0629d66.json
new file mode 100644
index 00000000..d69a45f3
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6e3bf0b3-a42c-4817-86ad-34b2a0629d66.json
@@ -0,0 +1,39 @@
+{
+  "id" : "6e3bf0b3-a42c-4817-86ad-34b2a0629d66",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNzNF6qIAMEYpA=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c347-1744a1b523a6f84924b11e9a;Parent=62999f77862d39bc;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:06:15 GMT",
+      "Via" : "1.1 b47176981720d8607d309e56e9510316.cloudfront.net (CloudFront), 1.1 87247d9a9b2f9e51b0c72b364948aefa.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c3470000000005e86ce7390aabfc",
+      "x-amzn-RequestId" : "840a53ae-482e-4097-9eb2-07e81e5646a7",
+      "X-Amz-Cf-Id" : "42ijB0NBOZsajIRYJM9rmHEI7VoJrl80qSr4E7qfmAG-Rku48cYZbg==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "6e3bf0b3-a42c-4817-86ad-34b2a0629d66",
+  "persistent" : true,
+  "insertionIndex" : 150
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6f11ffbe-72bc-4b49-8442-3d1d253d4dc1.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6f11ffbe-72bc-4b49-8442-3d1d253d4dc1.json
deleted file mode 100644
index ebfe39e4..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-6f11ffbe-72bc-4b49-8442-3d1d253d4dc1.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "6f11ffbe-72bc-4b49-8442-3d1d253d4dc1",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:37:46 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "7053440f-a15f-4e24-8ca9-14077d77dbfe",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9cd7a000000006ec4b9e12deffa05",
-      "x-amz-apigw-id" : "Zw0LNH60oAMEUNg=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9cd7a-60c2d2e53d4c513b0c4609e7;Parent=6a6fc7b1975fb917;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 e1832834d17ab65dd955f4e68cc524e6.cloudfront.net (CloudFront), 1.1 170efbc424be9181bda5d0fcd6e41f30.cloudfront.net (CloudFront)",
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-      "X-Amz-Cf-Id" : "rU33fHsnv479aeAZ-tq3H_x2va_4qTxr4fvW5Vj76d5e5sau2bcDwg=="
-    }
-  },
-  "uuid" : "6f11ffbe-72bc-4b49-8442-3d1d253d4dc1",
-  "persistent" : true,
-  "insertionIndex" : 128
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7187eddd-4c82-48c2-8117-57dd01ab7b6f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7187eddd-4c82-48c2-8117-57dd01ab7b6f.json
deleted file mode 100644
index dedb3505..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7187eddd-4c82-48c2-8117-57dd01ab7b6f.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "7187eddd-4c82-48c2-8117-57dd01ab7b6f",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:51 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "a70b9fc5-ff0a-4469-86e0-3aa7be658142",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549da0000000036b60062d73ebf60",
-      "x-amz-apigw-id" : "Y9h6RGb4IAMEdcw=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549da-2db5c89d52f863767e41687e;Parent=29329f6290713fab;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 7fcfc911845f681c235b0b3f32f3e1c6.cloudfront.net (CloudFront), 1.1 73b0c4a85645a8031ba157e0b3e28ffc.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "xX63IlxmfICuAlhRZ8MZt7QMMvUhjvl-e7h_Qb7sE9chmj2gkKDHSw=="
-    }
-  },
-  "uuid" : "7187eddd-4c82-48c2-8117-57dd01ab7b6f",
-  "persistent" : true,
-  "insertionIndex" : 92
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-75a59469-2bf7-4a57-88e0-c57c985ff095.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-75a59469-2bf7-4a57-88e0-c57c985ff095.json
new file mode 100644
index 00000000..f8d35eb5
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-75a59469-2bf7-4a57-88e0-c57c985ff095.json
@@ -0,0 +1,39 @@
+{
+  "id" : "75a59469-2bf7-4a57-88e0-c57c985ff095",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "CuQXCrIBCiAKDHNlcnZpY2UubmFtZRIQCg5icmFpbnRydXN0LWFwcAoiCg9zZXJ2aWNlLnZlcnNpb24SDwoNMC4zLjAtMWMwNGFmMAogChZ0ZWxlbWV0cnkuc2RrLmxhbmd1YWdlEgYKBGphdmEKJQoSdGVsZW1ldHJ5LnNkay5uYW1lEg8KDW9wZW50ZWxlbWV0cnkKIQoVdGVsZW1ldHJ5LnNkay52ZXJzaW9uEggKBjEuNTkuMBKsFgoRCg9icmFpbnRydXN0LWphdmESlhYKENFMK78PIDWWEFB4Oo8V+msSCIOgkCSyY+3/IghWoID8NRAxWioJcmVzcG9uc2VzMAE5Ud2AZo19pBhB41TbVpF9pBhKLgoaYnJhaW50cnVzdC5zcGFuX2F0dHJpYnV0ZXMSEAoOeyJ0eXBlIjoibGxtIn1KMgoRYnJhaW50cnVzdC5wYXJlbnQSHQobcHJvamVjdF9uYW1lOmphdmEtdW5pdC10ZXN0SqkBChVicmFpbnRydXN0LmlucHV0X2pzb24SjwEKjAFbeyJyb2xlIjoidXNlciIsImNvbnRlbnQiOiJMb29rIGF0IHRoaXMgc2VxdWVuY2U6IDIsIDYsIDEyLCAyMCwgMzAuIFdoYXQgaXMgdGhlIHBhdHRlcm4gYW5kIHdoYXQgd291bGQgYmUgdGhlIGZvcm11bGEgZm9yIHRoZSBudGggdGVybT9cbiJ9XUp2ChJicmFpbnRydXN0Lm1ldHJpY3MSYApeeyJjb21wbGV0aW9uX3Rva2VucyI6MTc2NywicHJvbXB0X3Rva2VucyI6NDEsInRva2VucyI6MTgwOCwiY29tcGxldGlvbl9yZWFzb25pbmdfdG9rZW5zIjoxNTM2fUqhAQoTYnJhaW50cnVzdC5tZXRhZGF0YRKJAQqGAXsicHJvdmlkZXIiOiJvcGVuYWkiLCJyZXF1ZXN0X3BhdGgiOiJyZXNwb25zZXMiLCJtb2RlbCI6Im80LW1pbmkiLCJyZXF1ZXN0X2Jhc2VfdXJpIjoiaHR0cDovL2xvY2FsaG9zdDo0MTUzMyIsInJlcXVlc3RfbWV0aG9kIjoiUE9TVCJ9SpoRChZicmFpbnRydXN0Lm91dHB1dF9qc29uEv8QCvwQW3siaWQiOiJyc18wYTkwNDIyM2M5YzJkZWM4MDA2OWQ2YzI5N2U5ODg4MTkwYjY4NzJkN2M1YWNkMWZlZiIsInR5cGUiOiJyZWFzb25pbmciLCJzdW1tYXJ5IjpbeyJ0eXBlIjoic3VtbWFyeV90ZXh0IiwidGV4dCI6IioqSWRlbnRpZnlpbmcgdGhlIHNlcXVlbmNlIHBhdHRlcm4qKlxuXG5UaGUgdXNlciBoYXMgc2hhcmVkIGEgc2VxdWVuY2U6IDIsIDYsIDEyLCAyMCwgMzAsIGFuZCBJ4oCZbSB0cnlpbmcgdG8gZmluZCB0aGUgcGF0dGVybi4gSXQgbG9va3MgbGlrZSB0aGVzZSBudW1iZXJzIGFyZSB0d2ljZSB0aGUgdHJpYW5ndWxhciBudW1iZXJzLCB3aGljaCBhcmUgY2FsY3VsYXRlZCBhcyBUX24gPSBuKG4rMSkvMi4gU28sIHRoZSBudGggdGVybSBjYW4gYmUgZXhwcmVzc2VkIGFzIGFfbiA9IG4obisxKS4gRm9yIG4gc3RhcnRpbmcgYXQgMSwgdGhpcyB5aWVsZHM6IGFfMT0yLCBhXzI9NiwgYV8zPTEyLCBhbmQgc28gZm9ydGguIEZvbGxvd2luZyBhbm90aGVyIGxpbmUgb2YgcmVhc29uaW5nLCBJIHJlYWxpemUgdGhlIGRpZmZlcmVuY2VzIGFyZSBhbHNvIGluY3JlYXNpbmcgY29uc2lzdGVudGx5LiJ9LHsidHlwZSI6InN1bW1hcnlfdGV4dCIsInRleHQiOiIqKkRlZmluaW5nIHRoZSBwcm9uaWMgc2VxdWVuY2UqKlxuXG5J4oCZdmUgYmVlbiBleHBsb3JpbmcgdGhlIHNlcXVlbmNlIDIsIDYsIDEyLCAyMCwgMzAgYW5kIGNhbGN1bGF0aW5nIHRoZSBkaWZmZXJlbmNlcyBiZXR3ZWVuIGNvbnNlY3V0aXZlIHRlcm1zLiBJIHNlZSB0aGF0IHRoZSBkaWZmZXJlbmNlcyBmb2xsb3cgdGhlIHBhdHRlcm4gZF9uID0gMm4gZm9yIG4gPj0gMi4gVGhpcyBtZWFucyBlYWNoIHRlcm0gY2FuIGJlIHJlcHJlc2VudGVkIGFzIHRoZSBzdW0gb2YgdGhlIHByZXZpb3VzIHRlcm0gYW5kIHRoYXQgZGlmZmVyZW5jZS4gVGhlcmVmb3JlLCBJIGlkZW50aWZ5IHRoZSBzZXF1ZW5jZSBhcyBwcm9uaWMgbnVtYmVycywgd2hpY2ggaXMgZXhwcmVzc2VkIGFzIGFfbiA9IG4obisxKS4gVWx0aW1hdGVseSwgdGhpcyB0ZWxscyBtZSB0aGF0IHRoZSBudGggdGVybSBmb3IgbiA+PSAxIGlzIG4obisxKS4ifSx7InR5cGUiOiJzdW1tYXJ5X3RleHQiLCJ0ZXh0IjoiKipFeHBsYWluaW5nIHRoZSBwcm9uaWMgbnVtYmVycyBzZXF1ZW5jZSoqXG5cbkkgbmVlZCB0byBjbGFyaWZ5IHRoYXQgaWYgd2Ugc3RhcnQgdGhlIHNlcXVlbmNlIGF0IG49MSwgdGhlbiB0aGUgZm9ybXVsYSBmb3IgdGhlIG50aCB0ZXJtIGlzIGFfbiA9IG4obisxKSwgd2hpY2ggcmVwcmVzZW50cyB0aGUgcHJvZHVjdCBvZiBzdWNjZXNzaXZlIGludGVnZXJzLCBvciBwcm9uaWMgbnVtYmVycy4gVGhlIGRpZmZlcmVuY2VzIGJldHdlZW4gdGVybXMgaW5jcmVhc2UgYnkgMiwgaW5kaWNhdGluZyBhIHF1YWRyYXRpYyBzZXF1ZW5jZS4gVGhlcmVmb3JlLCBJIGNvbmNsdWRlIHRoYXQgdGhlIHBhdHRlcm4gaXMgMiwgNiwgMTIsIDIwLCAzMCwgd2l0aCB0aGUgZ2VuZXJhbCBmb3JtdWxhIGJlaW5nIGFfbiA9IG5eMiArIG4uIElmIHN0YXJ0aW5nIGF0IG49MCwgaXQgd291bGQgc2hpZnQgdG8gYV9uID0gKG4rMSkobisyKS4ifV19LHsiaWQiOiJtc2dfMGE5MDQyMjNjOWMyZGVjODAwNjlkNmMyYTc1YmVjODE5MGEwNGZmYjQ0ZGQ1NmViNmYiLCJ0eXBlIjoibWVzc2FnZSIsInN0YXR1cyI6ImNvbXBsZXRlZCIsImNvbnRlbnQiOlt7InR5cGUiOiJvdXRwdXRfdGV4dCIsImFubm90YXRpb25zIjpbXSwibG9ncHJvYnMiOltdLCJ0ZXh0IjoiVGhlIOKAnGdhcHPigJ0gYmV0d2VlbiB0ZXJtcyBhcmUgIFxuNuKAkzI9NCwgMTLigJM2PTYsIDIw4oCTMTI9OCwgMzDigJMyMD0xMCzigKYgIFxuc28gdGhlIGRpZmZlcmVuY2VzIGFyZSA0LCA2LCA4LCAxMCzigKYgaS5lLiB0aGV5IGluY3JlYXNlIGJ5IDIgZWFjaCB0aW1lLiAgQSBzZXF1ZW5jZSB3aXRoIGxpbmVhcmx5IGdyb3dpbmcgZGlmZmVyZW5jZXMgaXMgcXVhZHJhdGljLiAgSW4gZmFjdCBvbmUgY2FuIGNoZWNrIHRoYXRcblxuYeKCgT0yLCBh4oKCPTYsIGHigoM9MTIg4oeSIGHigpk9bsKyK24uXG5cbkVxdWl2YWxlbnRseVxuXG5h4oKZPW4obisxKSwgIGZvciBuPTEsMiwzLOKAplxuXG53aGljaCBpbmRlZWQgZ2l2ZXMgMcK3Mj0yLCAywrczPTYsIDPCtzQ9MTIsIDTCtzU9MjAsIDXCtzY9MzAs4oCmIn1dLCJyb2xlIjoiYXNzaXN0YW50In1degCFAQEBAAA="
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNbEGIKoAMENtw=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2ac-543cbc3c4db0460f73587993;Parent=7f3e02157586dde2;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:03:41 GMT",
+      "Via" : "1.1 7fcfc911845f681c235b0b3f32f3e1c6.cloudfront.net (CloudFront), 1.1 0eb43913f9caf453beb959a8a836a688.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2ac00000000304c83830006c9a7",
+      "x-amzn-RequestId" : "732acc11-bf6f-4f7e-a456-e8f7642cd7b6",
+      "X-Amz-Cf-Id" : "LgVe1J4WttHPNNrntjUejLP_KztZtjWC54vi83Fin4qrwEXVfi0J1g==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "75a59469-2bf7-4a57-88e0-c57c985ff095",
+  "persistent" : true,
+  "insertionIndex" : 133
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-75bd8a50-e6c6-464a-b337-dab45cf28025.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-75bd8a50-e6c6-464a-b337-dab45cf28025.json
deleted file mode 100644
index e56062d3..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-75bd8a50-e6c6-464a-b337-dab45cf28025.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "75bd8a50-e6c6-464a-b337-dab45cf28025",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
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-    "bodyPatterns" : [ {
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-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:35:38 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "975a4764-8866-4a68-ae97-b1431eede6bc",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9ccfa000000006d54f5debcba7db3",
-      "x-amz-apigw-id" : "Zwz3IG1KIAMEvvw=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9ccfa-0456bc7a4435a76d64f07ebb;Parent=4ef246cf4ed766b0;Sampled=0;Lineage=1:24be3d11:0",
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-      "X-Amz-Cf-Id" : "5QHjHhG4uYXOhqoPh7omkuCWoVGNNZ8vqJRPklDFHY9kYtuWI-K9eg=="
-    }
-  },
-  "uuid" : "75bd8a50-e6c6-464a-b337-dab45cf28025",
-  "persistent" : true,
-  "insertionIndex" : 124
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-765369c4-2783-45af-99af-a3800fdd7006.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-765369c4-2783-45af-99af-a3800fdd7006.json
deleted file mode 100644
index 799f1cad..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-765369c4-2783-45af-99af-a3800fdd7006.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
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-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:11:03 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "0e8609fd-4148-460c-af0a-1ed69be5c463",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549e70000000044ccc7f1705f06e1",
-      "x-amz-apigw-id" : "Y9h8PG6zIAMEV-A=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549e7-7aef1e1a61c9d8f4271b78d6;Parent=14abdf2683d040d1;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 5e599a9eda8861379cfef6a522da18e4.cloudfront.net (CloudFront), 1.1 0df7f27a01014ab815259ca2d88193c6.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "tRITGeOupTQM5HESgsyEkfWgUVIVYYeWneBDnpndTCxVLgraKTyf_g=="
-    }
-  },
-  "uuid" : "765369c4-2783-45af-99af-a3800fdd7006",
-  "persistent" : true,
-  "insertionIndex" : 102
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7904ff97-3f35-4ee3-8c22-0e39324e29cb.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7904ff97-3f35-4ee3-8c22-0e39324e29cb.json
new file mode 100644
index 00000000..a557ffc4
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7904ff97-3f35-4ee3-8c22-0e39324e29cb.json
@@ -0,0 +1,39 @@
+{
+  "id" : "7904ff97-3f35-4ee3-8c22-0e39324e29cb",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7dedc996-befc-4b93-9540-376b1820eb72.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7dedc996-befc-4b93-9540-376b1820eb72.json
new file mode 100644
index 00000000..a16af0be
--- /dev/null
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@@ -0,0 +1,39 @@
+{
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+    "headers" : {
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7e95c59f-6487-4893-8056-4b3e317c30b9.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7e95c59f-6487-4893-8056-4b3e317c30b9.json
deleted file mode 100644
index f4b4a566..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-7e95c59f-6487-4893-8056-4b3e317c30b9.json
+++ /dev/null
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deleted file mode 100644
index e3ff9f0f..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-83afcf84-3ccf-44db-968c-2e8635c824de.json
+++ /dev/null
@@ -1,39 +0,0 @@
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-      "Via" : "1.1 2c24d855455b80190edd9e2dcdca3ee8.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "gmsKVqoLPwU1A2a97DJorXEJG3V5hn-6HdOqMXND5LILiUL_03SW8A=="
-    }
-  },
-  "uuid" : "83afcf84-3ccf-44db-968c-2e8635c824de",
-  "persistent" : true,
-  "insertionIndex" : 13
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-83f2c0bb-fa10-4f84-a92b-9436fc858f4f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-83f2c0bb-fa10-4f84-a92b-9436fc858f4f.json
deleted file mode 100644
index d6c41b24..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-83f2c0bb-fa10-4f84-a92b-9436fc858f4f.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "83f2c0bb-fa10-4f84-a92b-9436fc858f4f",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:17 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "b7c564c8-2611-4ea9-8b78-60684313e1e0",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549b9000000006d3cc9a96faa2d56",
-      "x-amz-apigw-id" : "Y9h1CELioAMERnw=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549b9-58179b0b0a52bef829f6bc2b;Parent=4d5afdf94bf120d2;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 940972e9e344075576fe20d5db482122.cloudfront.net (CloudFront), 1.1 170efbc424be9181bda5d0fcd6e41f30.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "K1L3ZigSsL3pOZhs0EP7Z_st1RmiQVWpUCEVC5qjg7IcmPD-vl34ew=="
-    }
-  },
-  "uuid" : "83f2c0bb-fa10-4f84-a92b-9436fc858f4f",
-  "persistent" : true,
-  "insertionIndex" : 31
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-8ae17bd9-0ed0-4038-bf1f-3e986e731077.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-8ae17bd9-0ed0-4038-bf1f-3e986e731077.json
deleted file mode 100644
index 8ec522cc..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-8ae17bd9-0ed0-4038-bf1f-3e986e731077.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "8ae17bd9-0ed0-4038-bf1f-3e986e731077",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "CscJCrgBCiAKDHNlcnZpY2UubmFtZRIQCg5icmFpbnRydXN0LWFwcAooCg9zZXJ2aWNlLnZlcnNpb24SFQoTMC4yLjUtMTBhOTMyNi1ESVJUWQogChZ0ZWxlbWV0cnkuc2RrLmxhbmd1YWdlEgYKBGphdmEKJQoSdGVsZW1ldHJ5LnNkay5uYW1lEg8KDW9wZW50ZWxlbWV0cnkKIQoVdGVsZW1ldHJ5LnNkay52ZXJzaW9uEggKBjEuNTQuMRKJCAowCiBpby5vcGVudGVsZW1ldHJ5Lm9wZW5haS1qYXZhLTEuMRIMMi4xOS4wLWFscGhhEtQHChD+/Tfra6Yb5GE7VLyTD/6XEgjFRjEsuBR6GyoPQ2hhdCBDb21wbGV0aW9uMAE543YZ8yU/lRhBrHJdEyY/lRhKHwoVZ2VuX2FpLm9wZXJhdGlvbi5uYW1lEgYKBGNoYXRKLAoeZ2VuX2FpLnJlc3BvbnNlLmZpbmlzaF9yZWFzb25zEgoqCAoGCgRzdG9wSigKHGJyYWludHJ1c3QubWV0YWRhdGEucHJvdmlkZXISCAoGb3BlbmFpSicKGmdlbl9haS5yZXF1ZXN0LnRlbXBlcmF0dXJlEgkhAAAAAAAAAABKPgoSZ2VuX2FpLnJlc3BvbnNlLmlkEigKJmNoYXRjbXBsLURBVTd3YUdSYVQ1QktQdDg5aEdrVlp2RlowRk5vSiAKGmdlbl9haS51c2FnZS5vdXRwdXRfdG9rZW5zEgIYB0oZCg1nZW5fYWkuc3lzdGVtEggKBm9wZW5haUqPAQoWZ2VuX2FpLm91dHB1dC5tZXNzYWdlcxJ1CnNbeyJyb2xlIjoiYXNzaXN0YW50IiwicGFydHMiOlt7InR5cGUiOiJ0ZXh0IiwiY29udGVudCI6IlRoZSBjYXBpdGFsIG9mIEZyYW5jZSBpcyBQYXJpcy4ifV0sImZpbmlzaF9yZWFzb24iOiJzdG9wIn1dSiUKFGdlbl9haS5yZXF1ZXN0Lm1vZGVsEg0KC2dwdC00by1taW5pSjMKJmJyYWludHJ1c3QubWV0cmljcy50aW1lX3RvX2ZpcnN0X3Rva2VuEgkhxBbMqa5N4T9KHwoZZ2VuX2FpLnVzYWdlLmlucHV0X3Rva2VucxICGBdKxwEKFWdlbl9haS5pbnB1dC5tZXNzYWdlcxKtAQqqAVt7InJvbGUiOiJzeXN0ZW0iLCJwYXJ0cyI6W3sidHlwZSI6InRleHQiLCJjb250ZW50IjoiWW91IGFyZSBhIGhlbHBmdWwgYXNzaXN0YW50In1dfSx7InJvbGUiOiJ1c2VyIiwicGFydHMiOlt7InR5cGUiOiJ0ZXh0IiwiY29udGVudCI6IldoYXQgaXMgdGhlIGNhcGl0YWwgb2YgRnJhbmNlPyJ9XX1dSjIKEWJyYWludHJ1c3QucGFyZW50Eh0KG3Byb2plY3RfbmFtZTpqYXZhLXVuaXQtdGVzdEoxChVnZW5fYWkucmVzcG9uc2UubW9kZWwSGAoWZ3B0LTRvLW1pbmktMjAyNC0wNy0xOEoqChlicmFpbnRydXN0Lm1ldGFkYXRhLm1vZGVsEg0KC2dwdC00by1taW5pegCFAQEBAAA="
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:11:01 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "bbc70fe8-8359-460a-92f1-2b41b2899ed1",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549e5000000007b00469925975560",
-      "x-amz-apigw-id" : "Y9h74HP9IAMECtA=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549e5-197765f019b3612e47b58717;Parent=2603eb4a5ac4287d;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 21c7c4234f218bb5110262cbbf01f870.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "UDrlfia53eNlwqoSMmJ3nGQYmlEvQOcWRrfZfJyTJyBPAbbaw8dLgA=="
-    }
-  },
-  "uuid" : "8ae17bd9-0ed0-4038-bf1f-3e986e731077",
-  "persistent" : true,
-  "insertionIndex" : 99
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-8b4ea7b8-a48e-4ade-8e80-2eafc4981e2b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-8b4ea7b8-a48e-4ade-8e80-2eafc4981e2b.json
deleted file mode 100644
index 9b60aebb..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-8b4ea7b8-a48e-4ade-8e80-2eafc4981e2b.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "8b4ea7b8-a48e-4ade-8e80-2eafc4981e2b",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:49 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "1e3ddc4b-2900-4f21-8426-5823130940ac",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549d9000000002d835ef19d4fb4bd",
-      "x-amz-apigw-id" : "Y9h6DE2soAMELvQ=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549d9-703cb92f52bdec532cb4ae12;Parent=06afef71c98dd22c;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 b7e07d6a19a4c8b2e410e9c1e173548c.cloudfront.net (CloudFront), 1.1 0eb43913f9caf453beb959a8a836a688.cloudfront.net (CloudFront)",
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-      "X-Amz-Cf-Id" : "bx3wI8wc60G1jwvZWTaYP-6wJUTcfyiym1xe9W0R1FYmaMz8X4FNDQ=="
-    }
-  },
-  "uuid" : "8b4ea7b8-a48e-4ade-8e80-2eafc4981e2b",
-  "persistent" : true,
-  "insertionIndex" : 91
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-8d7d9804-3696-4f6d-b354-d6ea0213c1d3.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-8d7d9804-3696-4f6d-b354-d6ea0213c1d3.json
new file mode 100644
index 00000000..aca68ad9
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-8d7d9804-3696-4f6d-b354-d6ea0213c1d3.json
@@ -0,0 +1,39 @@
+{
+  "id" : "8d7d9804-3696-4f6d-b354-d6ea0213c1d3",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
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"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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNOeEdaoAMEHXg=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c25c-3a55db1571208d352a188eff;Parent=02f1f72442269833;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:20 GMT",
+      "Via" : "1.1 8e6c2cf5874f5e4093136cc3de4d856a.cloudfront.net (CloudFront), 1.1 dbfd9bcc806d4c322e72b461b2458112.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c25c000000001b1e536383f8b081",
+      "x-amzn-RequestId" : "746fdf8c-87e1-45f5-85ec-e46cf4fb7377",
+      "X-Amz-Cf-Id" : "fNIvflqZfB4l7nXBn90MFYJlGqzi2an_eKJUOiQnOGlOFoHN8MbM4Q==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "9a40ff66-614a-4fa7-818c-6d70671e1542",
+  "persistent" : true,
+  "insertionIndex" : 90
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-9dcb3820-dd5a-41e3-b0bb-feaf397bc566.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-9dcb3820-dd5a-41e3-b0bb-feaf397bc566.json
deleted file mode 100644
index f37599c0..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-9dcb3820-dd5a-41e3-b0bb-feaf397bc566.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "9dcb3820-dd5a-41e3-b0bb-feaf397bc566",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:54 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "d8e44fe3-fe53-47f0-86bc-cf7be08facf8",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549dd000000004c40d8f6e49d4a86",
-      "x-amz-apigw-id" : "Y9h6vEa6IAMEp7w=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549dd-5c3aa864111abcbc602442ba;Parent=01e24d40cc17126c;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 a642518ef4d5fb78c3190de112922a38.cloudfront.net (CloudFront), 1.1 e82f2bd1d85893fad1abb144337e7368.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "P0Iq6SOeDVMhvX_4CZaacW2Z50AWvkwej1yPAQIlil6r_BiZ3Mz8FA=="
-    }
-  },
-  "uuid" : "9dcb3820-dd5a-41e3-b0bb-feaf397bc566",
-  "persistent" : true,
-  "insertionIndex" : 94
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-9f9c4960-173e-4c36-a7b3-844b41eab38d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-9f9c4960-173e-4c36-a7b3-844b41eab38d.json
deleted file mode 100644
index e43ae244..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-9f9c4960-173e-4c36-a7b3-844b41eab38d.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "9f9c4960-173e-4c36-a7b3-844b41eab38d",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
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-  },
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-    "headers" : {
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-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:59 GMT",
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-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549e3000000002638e3177a74e842",
-      "x-amz-apigw-id" : "Y9h7nHHNoAMEHdQ=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549e3-34fe3463314a37f907d5fcb0;Parent=05abc8948f170b23;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 5e599a9eda8861379cfef6a522da18e4.cloudfront.net (CloudFront), 1.1 da32b45f2cc22dc818960285c4e91b66.cloudfront.net (CloudFront)",
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-  "uuid" : "9f9c4960-173e-4c36-a7b3-844b41eab38d",
-  "persistent" : true,
-  "insertionIndex" : 96
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a0c8a84a-0939-416c-b7d1-4fced391f690.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a0c8a84a-0939-416c-b7d1-4fced391f690.json
new file mode 100644
index 00000000..303a7a5b
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a0c8a84a-0939-416c-b7d1-4fced391f690.json
@@ -0,0 +1,39 @@
+{
+  "id" : "a0c8a84a-0939-416c-b7d1-4fced391f690",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNxqEDuoAMEFzg=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c33d-6fddc6c6587a96682e97a20a;Parent=76074d0f0a5b35f3;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:06:05 GMT",
+      "Via" : "1.1 20b3731a0ef4aba3db1fcd63c3ef2b2a.cloudfront.net (CloudFront), 1.1 73b0c4a85645a8031ba157e0b3e28ffc.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c33d00000000459bd88d710b02ce",
+      "x-amzn-RequestId" : "fcb4e08c-c06b-4e70-b397-bbcd8e05bf0c",
+      "X-Amz-Cf-Id" : "YKIfhR__EIl1lBAyWEgEn4NghxvQ8MtFarZEy-y6v06fFmlUw7lrdQ==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "a0c8a84a-0939-416c-b7d1-4fced391f690",
+  "persistent" : true,
+  "insertionIndex" : 146
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a2677d95-c82a-4252-a20a-9d2981720285.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a2677d95-c82a-4252-a20a-9d2981720285.json
deleted file mode 100644
index d2cb0a69..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a2677d95-c82a-4252-a20a-9d2981720285.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
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-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:21 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "25691626-981c-4619-b3d9-cc32456453db",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549bc0000000040daff26a46c300d",
-      "x-amz-apigw-id" : "Y9h1jEbQIAMEWUA=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549bc-0f9443b3225d70c56a5e1e51;Parent=6b27d1ec23dd2cbb;Sampled=0;Lineage=1:24be3d11:0",
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-      "X-Amz-Cf-Id" : "jAOEcDHWRP2Km0jTdYoz3Vo8bomhyDCUavCeHGnZmx2YZNv12yfMOA=="
-    }
-  },
-  "uuid" : "a2677d95-c82a-4252-a20a-9d2981720285",
-  "persistent" : true,
-  "insertionIndex" : 39
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a5d45134-a913-4a61-ada7-721417b2027b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a5d45134-a913-4a61-ada7-721417b2027b.json
deleted file mode 100644
index 422b8d1d..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a5d45134-a913-4a61-ada7-721417b2027b.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "a5d45134-a913-4a61-ada7-721417b2027b",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
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-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 00:34:37 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "aaae5927-be23-4141-b1c3-1ae3cf01bf69",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a8cf9c0000000078e6f7c12944a905",
-      "x-amz-apigw-id" : "ZuVgjH9hoAMEGuA=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a8cf9c-05d5074771717f5879aba24f;Parent=5f525ba9736b7a15;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 b47176981720d8607d309e56e9510316.cloudfront.net (CloudFront), 1.1 73b0c4a85645a8031ba157e0b3e28ffc.cloudfront.net (CloudFront)",
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-      "X-Amz-Cf-Id" : "VvbveqdKCcyfEEk_3Hffk_n5gTCeCXTJftmsOoMerO2TpcevO5nJ7w=="
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-  },
-  "uuid" : "a5d45134-a913-4a61-ada7-721417b2027b",
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-  "insertionIndex" : 110
-}
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a763f8ff-ac48-42d2-ad49-0f4204d96615.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a763f8ff-ac48-42d2-ad49-0f4204d96615.json
new file mode 100644
index 00000000..e9bfef73
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-a763f8ff-ac48-42d2-ad49-0f4204d96615.json
@@ -0,0 +1,39 @@
+{
+  "id" : "a763f8ff-ac48-42d2-ad49-0f4204d96615",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNOTFwYIAMENtw=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c25b-58cbd56549527e4735a65671;Parent=580340944e5606a6;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:19 GMT",
+      "Via" : "1.1 d08613e1dd8ad614e47875ae31a8af20.cloudfront.net (CloudFront), 1.1 b669d9add7767f73665f1f8b7e8cd802.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c25b000000000fca400db84bc6b0",
+      "x-amzn-RequestId" : "8c66959a-3fab-4eeb-a6ec-8659ab4e12b0",
+      "X-Amz-Cf-Id" : "EryyAUAHp5cTAcZfgfVscJSQwHzWO0407O3myMzFWA6aDq2q8D-Z9g==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "a763f8ff-ac48-42d2-ad49-0f4204d96615",
+  "persistent" : true,
+  "insertionIndex" : 93
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-aa178f53-938e-44fa-81e3-865b0df28598.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-aa178f53-938e-44fa-81e3-865b0df28598.json
new file mode 100644
index 00000000..039c47b3
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-aa178f53-938e-44fa-81e3-865b0df28598.json
@@ -0,0 +1,39 @@
+{
+  "id" : "aa178f53-938e-44fa-81e3-865b0df28598",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
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+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNOGEgqoAMEmpQ=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c259-3e033f8f1385968d33884392;Parent=533f119eec43433e;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:18 GMT",
+      "Via" : "1.1 940972e9e344075576fe20d5db482122.cloudfront.net (CloudFront), 1.1 4ac8d091dce10e726cfc5404bfed72b8.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c25900000000614135ab03a951bd",
+      "x-amzn-RequestId" : "6314f439-c426-489c-92d7-4ed9c5c5102e",
+      "X-Amz-Cf-Id" : "9uEejdd866vuFDC3D4JCe--0qqX78PIafNwr65Xb07DToJjWzE9w7w==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "aa178f53-938e-44fa-81e3-865b0df28598",
+  "persistent" : true,
+  "insertionIndex" : 95
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-acca271e-4bac-40c4-adfb-f3612a297cc6.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-acca271e-4bac-40c4-adfb-f3612a297cc6.json
deleted file mode 100644
index e9e57e13..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-acca271e-4bac-40c4-adfb-f3612a297cc6.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "acca271e-4bac-40c4-adfb-f3612a297cc6",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:14:48 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "53efbdfd-4e69-459a-9e78-781c5d131a4e",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9c817000000001b5b33e8005b2940",
-      "x-amz-apigw-id" : "ZwwzxHyqIAMEK3Q=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9c817-35b01274712a825a2b453c99;Parent=1f7b8481efc6fdb3;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 487082619948f670d3b30fb3db8fbabc.cloudfront.net (CloudFront), 1.1 0eb43913f9caf453beb959a8a836a688.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "sszUoVaD0jfAIjH8Q4hY5SADefQbG-aS2Wlma1smFxWYGuxW6emyLQ=="
-    }
-  },
-  "uuid" : "acca271e-4bac-40c4-adfb-f3612a297cc6",
-  "persistent" : true,
-  "insertionIndex" : 121
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ad78ab0b-4991-406e-b8de-320c2ed72b70.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ad78ab0b-4991-406e-b8de-320c2ed72b70.json
deleted file mode 100644
index 8dc37493..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ad78ab0b-4991-406e-b8de-320c2ed72b70.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "ad78ab0b-4991-406e-b8de-320c2ed72b70",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : 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-  "response" : {
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-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:31 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "9d3b5344-0780-45c8-9d97-08e125faa82d",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549c60000000022a852f4e892e352",
-      "x-amz-apigw-id" : "Y9h3HGNloAMEc_Q=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549c6-2eabe669038220cf378c9034;Parent=134a72b71fab2025;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 487082619948f670d3b30fb3db8fbabc.cloudfront.net (CloudFront), 1.1 ee5f8da78d4211a93c9dba8864a4067e.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "BxPZVjk7AzexfGpuS0RWI1qdPRXtn-S1LZUZRsJt6qZdCb35nsFMrQ=="
-    }
-  },
-  "uuid" : "ad78ab0b-4991-406e-b8de-320c2ed72b70",
-  "persistent" : true,
-  "insertionIndex" : 63
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ae6954af-acc7-45f0-a532-5f0ba2033d07.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ae6954af-acc7-45f0-a532-5f0ba2033d07.json
new file mode 100644
index 00000000..9cbeb37c
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ae6954af-acc7-45f0-a532-5f0ba2033d07.json
@@ -0,0 +1,39 @@
+{
+  "id" : "ae6954af-acc7-45f0-a532-5f0ba2033d07",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNZWFADIAMErCA=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2a1-668f7e245eb4750c7fa92d50;Parent=33d3a21173e47348;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:03:30 GMT",
+      "Via" : "1.1 d08613e1dd8ad614e47875ae31a8af20.cloudfront.net (CloudFront), 1.1 83d24992402f7b214901ab76fbdc11e2.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2a1000000000912ee2cbb745f3f",
+      "x-amzn-RequestId" : "06b6b016-54e6-4278-b222-4f9b614ec176",
+      "X-Amz-Cf-Id" : "T9TGRXdYGYYgBDU-21B6PHUrRSiLjtPoHEs3JoJmUf-MueBjOEBqAA==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "ae6954af-acc7-45f0-a532-5f0ba2033d07",
+  "persistent" : true,
+  "insertionIndex" : 135
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-b4045be6-a661-4c2e-8fb6-793a3e42fc14.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-b4045be6-a661-4c2e-8fb6-793a3e42fc14.json
deleted file mode 100644
index 8cb838a2..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-b4045be6-a661-4c2e-8fb6-793a3e42fc14.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "b4045be6-a661-4c2e-8fb6-793a3e42fc14",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:14:45 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "54436bc9-b8c2-4af2-a9be-82e61120ebb4",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9c8150000000048de85946c1b2775",
-      "x-amz-apigw-id" : "ZwwzXHKroAMEXdg=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9c815-76f2d4396e6310a45d96160e;Parent=5ce52d91e2e8f699;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 2c24d855455b80190edd9e2dcdca3ee8.cloudfront.net (CloudFront), 1.1 65f2e9f7f1475de54aa452d3ceb9bcf6.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "P8nzNFvx1ga89EKGsnAISuWu0-0MdYFdouptaktVqACci6UjnfDFTg=="
-    }
-  },
-  "uuid" : "b4045be6-a661-4c2e-8fb6-793a3e42fc14",
-  "persistent" : true,
-  "insertionIndex" : 119
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-b532f707-98c1-41af-8e1c-34574beeec45.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-b532f707-98c1-41af-8e1c-34574beeec45.json
new file mode 100644
index 00000000..a69104ce
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-b532f707-98c1-41af-8e1c-34574beeec45.json
@@ -0,0 +1,39 @@
+{
+  "id" : "b532f707-98c1-41af-8e1c-34574beeec45",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNvpGugIAMEFzg=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c330-4ee4a8ff2e52603248e4bbd0;Parent=36bdda2a29e9efc3;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:05:52 GMT",
+      "Via" : "1.1 db84db36e16ca0c80b0992006d731900.cloudfront.net (CloudFront), 1.1 ffe9646b2ea911744e2d51fc0715cedc.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c330000000006b03d62afecdd8e1",
+      "x-amzn-RequestId" : "069bf274-fc74-43dc-a06c-a244a13ff400",
+      "X-Amz-Cf-Id" : "G9mmO3R8B3VgaRCTycl3B90x1mJnqOcJZsUeaO_ZpQ6z6AHkb9srnA==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "b532f707-98c1-41af-8e1c-34574beeec45",
+  "persistent" : true,
+  "insertionIndex" : 143
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ba6de2f6-d923-40b4-ab23-2186093eab38.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ba6de2f6-d923-40b4-ab23-2186093eab38.json
new file mode 100644
index 00000000..0b7166b5
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ba6de2f6-d923-40b4-ab23-2186093eab38.json
@@ -0,0 +1,39 @@
+{
+  "id" : "ba6de2f6-d923-40b4-ab23-2186093eab38",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhN3AE7aIAMERdg=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c35f-6353fdad1c765f2231db0a33;Parent=637481c9c2c50475;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:06:39 GMT",
+      "Via" : "1.1 d118b2ea8414d381f46f91331ab67f02.cloudfront.net (CloudFront), 1.1 77f3c89ffd619275648d49ad13868570.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c35f000000005406815c885b39c5",
+      "x-amzn-RequestId" : "4cb133d2-b124-437e-bc9c-c4e009dd67b8",
+      "X-Amz-Cf-Id" : "-DyEpj4HsRKxgemB-QD1rdRfsorzQMO0MAWSY_Qh41pxxPJWo_htsA==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "ba6de2f6-d923-40b4-ab23-2186093eab38",
+  "persistent" : true,
+  "insertionIndex" : 160
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-bd973d23-2b00-4141-a7a4-4588bb926e33.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-bd973d23-2b00-4141-a7a4-4588bb926e33.json
deleted file mode 100644
index 9b0c9700..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-bd973d23-2b00-4141-a7a4-4588bb926e33.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "bd973d23-2b00-4141-a7a4-4588bb926e33",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
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-    "headers" : {
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-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 00:34:35 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "6f3a5bde-7543-4403-b150-d286a7d87585",
-      "x-amzn-Remapped-content-length" : "0",
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-      "x-amz-apigw-id" : "ZuVgYFwAIAMETAA=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a8cf9b-63f40fdc0721cf3014773538;Parent=5ba2df3285a845d7;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 4c9457912580c6114eec78b8fa604a20.cloudfront.net (CloudFront), 1.1 77f3c89ffd619275648d49ad13868570.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "9CJexppONjPeRUxkB-EUANv8Ysxv42V7L93kTLh-HqfGldcFGHkVtg=="
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-  },
-  "uuid" : "bd973d23-2b00-4141-a7a4-4588bb926e33",
-  "persistent" : true,
-  "insertionIndex" : 109
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-bde0a1f8-cf6f-4ce5-b0bc-e3554b7da133.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-bde0a1f8-cf6f-4ce5-b0bc-e3554b7da133.json
deleted file mode 100644
index 2542c558..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-bde0a1f8-cf6f-4ce5-b0bc-e3554b7da133.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "bde0a1f8-cf6f-4ce5-b0bc-e3554b7da133",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
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deleted file mode 100644
index 43b1ca34..00000000
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index 9fe05780..00000000
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new file mode 100644
index 00000000..3b67f04c
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-c9f40527-e4f6-48f7-bb17-ff42e8693f3e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-c9f40527-e4f6-48f7-bb17-ff42e8693f3e.json
new file mode 100644
index 00000000..a0b8cda7
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-c9f40527-e4f6-48f7-bb17-ff42e8693f3e.json
@@ -0,0 +1,39 @@
+{
+  "id" : "c9f40527-e4f6-48f7-bb17-ff42e8693f3e",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "CrUZCrIBCiAKDHNlcnZpY2UubmFtZRIQCg5icmFpbnRydXN0LWFwcAoiCg9zZXJ2aWNlLnZlcnNpb24SDwoNMC4zLjAtMWMwNGFmMAogChZ0ZWxlbWV0cnkuc2RrLmxhbmd1YWdlEgYKBGphdmEKJQoSdGVsZW1ldHJ5LnNkay5uYW1lEg8KDW9wZW50ZWxlbWV0cnkKIQoVdGVsZW1ldHJ5LnNkay52ZXJzaW9uEggKBjEuNTkuMBL9FwoRCg9icmFpbnRydXN0LWphdmES5xcKECrZNAtCubzlX8Sdbr51NXASCEVuQ8Ka7tdhIgj1NfVag7hDWSoJcmVzcG9uc2VzMAE58IJyvIx9pBhB9yMZn5B9pBhKLgoaYnJhaW50cnVzdC5zcGFuX2F0dHJpYnV0ZXMSEAoOeyJ0eXBlIjoibGxtIn1KMgoRYnJhaW50cnVzdC5wYXJlbnQSHQobcHJvamVjdF9uYW1lOmphdmEtdW5pdC10ZXN0SqkBChVicmFpbnRydXN0LmlucHV0X2pzb24SjwEKjAFbeyJyb2xlIjoidXNlciIsImNvbnRlbnQiOiJMb29rIGF0IHRoaXMgc2VxdWVuY2U6IDIsIDYsIDEyLCAyMCwgMzAuIFdoYXQgaXMgdGhlIHBhdHRlcm4gYW5kIHdoYXQgd291bGQgYmUgdGhlIGZvcm11bGEgZm9yIHRoZSBudGggdGVybT9cbiJ9XUp2ChJicmFpbnRydXN0Lm1ldHJpY3MSYApeeyJjb21wbGV0aW9uX3Rva2VucyI6MTgwOSwicHJvbXB0X3Rva2VucyI6NDEsInRva2VucyI6MTg1MCwiY29tcGxldGlvbl9yZWFzb25pbmdfdG9rZW5zIjoxNTM2fUqhAQoTYnJhaW50cnVzdC5tZXRhZGF0YRKJAQqGAXsicHJvdmlkZXIiOiJvcGVuYWkiLCJyZXF1ZXN0X3BhdGgiOiJyZXNwb25zZXMiLCJtb2RlbCI6Im80LW1pbmkiLCJyZXF1ZXN0X2Jhc2VfdXJpIjoiaHR0cDovL2xvY2FsaG9zdDo0MTUzMyIsInJlcXVlc3RfbWV0aG9kIjoiUE9TVCJ9SusSChZicmFpbnRydXN0Lm91dHB1dF9qc29uEtASCs0SW3siaWQiOiJyc18wNzdmNzY4MDU4ZjI2NmM2MDA2OWQ2YzI5NGZlN2M4MTk1OGY1NmRiYmYyMjZmZjlhNiIsInR5cGUiOiJyZWFzb25pbmciLCJzdW1tYXJ5IjpbeyJ0eXBlIjoic3VtbWFyeV90ZXh0IiwidGV4dCI6IioqSWRlbnRpZnlpbmcgdGhlIHNlcXVlbmNlIHBhdHRlcm4qKlxuXG5UaGUgdXNlciBoYXMgZ2l2ZW4gbWUgdGhlIHNlcXVlbmNlOiAyLCA2LCAxMiwgMjAsIDMwLCBhbmQgdGhleSB3YW50IHRvIGZpbmQgdGhlIHBhdHRlcm4uIEkgc2VlIHRoYXQgaXQncyByZWxhdGVkIHRvIHRoZSBmb3JtdWxhIG4obisxKS4gQ2hlY2tpbmcgdGhpcywgSSBmaW5kIHRoYXQgZm9yIG49MSwgaXQgcHJvZHVjZXMgMjsgZm9yIG49MiwgaXQgZ2l2ZXMgNjsgYW5kIHNvIG9uLiBUaGlzIGluZGljYXRlcyB0aGF0IHRoZSBmb3JtdWxhIGluZGVlZCB3b3Jrcy4gQWxzbywgdGhlcmUncyBhbiBhbHRlcm5hdGl2ZSBpbnRlcnByZXRhdGlvbiBhcyB0cmlhbmd1bGFyIG51bWJlcnMgbXVsdGlwbGllZCBieSAyLiBUaGUgZGlmZmVyZW5jZXMgc3VnZ2VzdCBhIHF1YWRyYXRpYyBwYXR0ZXJuLCBjb25maXJtaW5nIHRoYXQgYV9uID0gbihuKzEpIGlzIGNvcnJlY3QuIn0seyJ0eXBlIjoic3VtbWFyeV90ZXh0IiwidGV4dCI6IioqRXhwbGFpbmluZyB0aGUgcHJvbmljIG51bWJlcnMqKlxuXG5UaGUgcGF0dGVybiBoZXJlIGlzIGFib3V0IHByb25pYyBudW1iZXJzLCB3aGljaCBhcmUgcHJvZHVjZWQgYnkgbXVsdGlwbHlpbmcgdHdvIGNvbnNlY3V0aXZlIGludGVnZXJzLiBTbywgSSBjYW4gZXhwcmVzcyB0aGlzIGFzIGFfbiA9IG4obisxKS4gVGhpcyBtZWFucyB0aGUgbnVtYmVycyAyLCA2LCAxMiwgZXRjLiwgYXJlIGFsc28gdHdpY2UgdGhlIHRyaWFuZ3VsYXIgbnVtYmVycy4gSSB3YW50IHRvIGNsYXJpZnkgdGhhdCB0aGUgZGlmZmVyZW5jZXMgYmV0d2VlbiB0aGUgdGVybXMgaW5jcmVhc2UgYnkgMiBlYWNoIHRpbWUsIHNob3dpbmcgdGhhdCBpdOKAmXMgYSBxdWFkcmF0aWMgc2VxdWVuY2UuIFRoZSBudGggdGVybSBmb3JtdWxhIHJlbWFpbnMgYV9uID0gbihuKzEpLCB0eXBpY2FsbHkgc3RhcnRpbmcgZnJvbSBuPTEuIFRoZXJlZm9yZSwgdGhlIGFuc3dlciBpcyBhX24gPSBuXjIgKyBuIGZvciBu4omlMS4ifSx7InR5cGUiOiJzdW1tYXJ5X3RleHQiLCJ0ZXh0IjoiKipFeHBsYWluaW5nIHRoZSBzZXF1ZW5jZSBwYXR0ZXJuKipcblxuVGhlIHVzZXIgcHJvdmlkZWQgdGhlIHNlcXVlbmNlOiAyLCA2LCAxMiwgMjAsIDMwLCBhbmQgYXNrcyBmb3IgdGhlIHBhdHRlcm4gYW5kIG50aCB0ZXJtIGZvcm11bGEuIEkgc2VlIHRoYXQgdGhlIGRpZmZlcmVuY2VzIGluY3JlYXNlIGJ5IDI6ICs0LCArNiwgKzgsICsxMC4gVGhpcyBpbmRpY2F0ZXMgaXQgZm9sbG93cyB0aGUgcHJvbmljIG51bWJlcnMsIG1lYW5pbmcgdGhlIGZvcm11bGEgaXMgYV9uID0gbihuKzEpLiBUbyBjbGFyaWZ5LCBlYWNoIHRlcm0gaXMgYSBwcm9kdWN0IG9mIHR3byBjb25zZWN1dGl2ZSBpbnRlZ2Vycy4gVGh1cywgdGhlIGZpbmFsIG1lc3NhZ2Ugc2hvdWxkIHN0YXRlOiBwYXR0ZXJuOiBwcm9kdWN0IG9mIGNvbnNlY3V0aXZlIGludGVnZXJzLCBmb3JtdWxhOiBhX24gPSBuKG4rMSkuIFRoaXMgY2FwdHVyZXMgdGhlIGVzc2VuY2Ugb2YgdGhlIHNlcXVlbmNlISJ9XX0seyJpZCI6Im1zZ18wNzdmNzY4MDU4ZjI2NmM2MDA2OWQ2YzJhNDcwOTg4MTk1YmIzNTBhNzkxYmZlZjRjNyIsInR5cGUiOiJtZXNzYWdlIiwic3RhdHVzIjoiY29tcGxldGVkIiwiY29udGVudCI6W3sidHlwZSI6Im91dHB1dF90ZXh0IiwiYW5ub3RhdGlvbnMiOltdLCJsb2dwcm9icyI6W10sInRleHQiOiJUaGUgcGF0dGVybiBpcyB0aGF0IHRoZSBkaWZmZXJlbmNlcyBnbyB1cCBieSAyIGVhY2ggdGltZTpcblxuICA24oCTMj00LCAgMTLigJM2PTYsICAyMOKAkzEyPTgsICAzMOKAkzIwPTEwLCDigKZcblxuQSBxdWljayB3YXkgdG8gc2VlIGl04oCZcyBxdWFkcmF0aWMgaXMgdG8gbm90ZSB0aGUgc2Vjb25kIGRpZmZlcmVuY2VzIGFyZSBjb25zdGFudCAoMiksIHNvICBcbmHigpk9QW7CsitCbitDLiAgUGx1Z2dpbmcgaW4gbj0xLDIsMyBnaXZlcyBBPTEsIEI9MSwgQz0wLlxuXG5FcXVpdmFsZW50bHksIGVhY2ggdGVybSBpcyB0aGUgcHJvZHVjdCBvZiB0d28gY29uc2VjdXRpdmUgaW50ZWdlcnM6XG5cbiAgYeKCmSA9IG7CtyhuKzEpLlxuXG5TbyBmb3Igbj0xLDIsMyw0LDUs4oCmIHlvdSBnZXRcblxuICBh4oKBPTHCtzI9MiwgIGHigoI9MsK3Mz02LCAgYeKCgz0zwrc0PTEyLCAgYeKChD00wrc1PTIwLCAgYeKChT01wrc2PTMwLCDigKZcblxuSW4gY2xvc2VkLWZvcm06ICBcblxuICBh4oKZID0gbsKyICsgbiA9IG4obisxKS4ifV0sInJvbGUiOiJhc3Npc3RhbnQifV16AIUBAQEAAA=="
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNaMG__oAMEXzQ=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c2a7-3bfebcd22424766f4a94d751;Parent=18097296100504c8;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:03:35 GMT",
+      "Via" : "1.1 724581b48d733e53834b535d2a623034.cloudfront.net (CloudFront), 1.1 65f2e9f7f1475de54aa452d3ceb9bcf6.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2a7000000000691d15166c47e45",
+      "x-amzn-RequestId" : "babea881-dffc-45f3-a3b7-2cd44cf8e035",
+      "X-Amz-Cf-Id" : "LInZJtQCnrALTdFbQQ-Gmo8Edk47-ZQVYAfcBpHx9Ia__-CiYN1aew==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "c9f40527-e4f6-48f7-bb17-ff42e8693f3e",
+  "persistent" : true,
+  "insertionIndex" : 134
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ce45d0f5-247f-4755-93f7-3238cc244345.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ce45d0f5-247f-4755-93f7-3238cc244345.json
deleted file mode 100644
index d86cbdcc..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ce45d0f5-247f-4755-93f7-3238cc244345.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "ce45d0f5-247f-4755-93f7-3238cc244345",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "CuYCCrgBCiAKDHNlcnZpY2UubmFtZRIQCg5icmFpbnRydXN0LWFwcAooCg9zZXJ2aWNlLnZlcnNpb24SFQoTMC4yLjUtMTBhOTMyNi1ESVJUWQogChZ0ZWxlbWV0cnkuc2RrLmxhbmd1YWdlEgYKBGphdmEKJQoSdGVsZW1ldHJ5LnNkay5uYW1lEg8KDW9wZW50ZWxlbWV0cnkKIQoVdGVsZW1ldHJ5LnNkay52ZXJzaW9uEggKBjEuNTQuMRKoAQoYChZkaXN0cmlidXRlZC10cmFjZS10ZXN0EosBChAc1zqFB6ucD+q2VuncryiEEgj8FK9s0DtgCSoddGVzdC1kaXN0cmlidXRlZC10cmFjZS1wYXJlbnQwATm2XuLHID+VGEFKELaPIT+VGEoyChFicmFpbnRydXN0LnBhcmVudBIdChtwcm9qZWN0X25hbWU6amF2YS11bml0LXRlc3R6AIUBAQEAAA=="
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:42 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "f290f5a7-a671-4fdf-abaa-5715245bdeec",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549d1000000003efb027e0711105a",
-      "x-amz-apigw-id" : "Y9h42HTyIAMEnIg=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549d1-0a0ac4146499377418e24b67;Parent=53b37a967cc1343c;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 b7e07d6a19a4c8b2e410e9c1e173548c.cloudfront.net (CloudFront), 1.1 96f6dcbb4d7267cad6eb0747bce72024.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "vJLAin4hnbmL5HVfznBwGwkq8udJaTT65Q6Q4phMcpr4zfHBP-CgHA=="
-    }
-  },
-  "uuid" : "ce45d0f5-247f-4755-93f7-3238cc244345",
-  "persistent" : true,
-  "insertionIndex" : 79
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d01e12fe-bf47-4ac6-b850-2731129652ce.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d01e12fe-bf47-4ac6-b850-2731129652ce.json
deleted file mode 100644
index d6e8fbad..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d01e12fe-bf47-4ac6-b850-2731129652ce.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "d01e12fe-bf47-4ac6-b850-2731129652ce",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "CswKCrgBCiAKDHNlcnZpY2UubmFtZRIQCg5icmFpbnRydXN0LWFwcAooCg9zZXJ2aWNlLnZlcnNpb24SFQoTMC4yLjktZDE1NTA3OS1ESVJUWQogChZ0ZWxlbWV0cnkuc2RrLmxhbmd1YWdlEgYKBGphdmEKJQoSdGVsZW1ldHJ5LnNkay5uYW1lEg8KDW9wZW50ZWxlbWV0cnkKIQoVdGVsZW1ldHJ5LnNkay52ZXJzaW9uEggKBjEuNTkuMBKOCQomCg9icmFpbnRydXN0LWphdmESEzAuMi45LWQxNTUwNzktRElSVFkS4wgKEAbeTmAYIAxmV66PMo1Tiw4SCFTHDQzT6jK/KghNZXNzYWdlczABOaCPDpjFypkYQQWpYbrFypkYSlcKFWJyYWludHJ1c3QuaW5wdXRfanNvbhI+CjxbeyJjb250ZW50IjoiV2hhdCBpcyB0aGUgY2FwaXRhbCBvZiBGcmFuY2U/Iiwicm9sZSI6InVzZXIifV1KcAoSYnJhaW50cnVzdC5tZXRyaWNzEloKWHsiY29tcGxldGlvbl90b2tlbnMiOjEwLCJwcm9tcHRfdG9rZW5zIjoxOSwidG9rZW5zIjoyOSwidGltZV90b19maXJzdF90b2tlbiI6MC4wMDE1MDI3NX1KMgoRYnJhaW50cnVzdC5wYXJlbnQSHQobcHJvamVjdF9uYW1lOmphdmEtdW5pdC10ZXN0Si4KGmJyYWludHJ1c3Quc3Bhbl9hdHRyaWJ1dGVzEhAKDnsidHlwZSI6ImxsbSJ9SswEChZicmFpbnRydXN0Lm91dHB1dF9qc29uErEECq4EeyJpZCI6Im1zZ18wMThLTlFNZWNWQllITlZmTDhwQVU4WXYiLCJjb250ZW50IjpbeyJjaXRhdGlvbnMiOm51bGwsInRleHQiOiJUaGUgY2FwaXRhbCBvZiBGcmFuY2UgaXMgUGFyaXMuIiwidHlwZSI6InRleHQiLCJ2YWxpZCI6dHJ1ZX1dLCJtb2RlbCI6ImNsYXVkZS0zLWhhaWt1LTIwMjQwMzA3Iiwicm9sZSI6ImFzc2lzdGFudCIsInN0b3BfcmVhc29uIjoiZW5kX3R1cm4iLCJzdG9wX3NlcXVlbmNlIjpudWxsLCJ0eXBlIjoibWVzc2FnZSIsInVzYWdlIjp7ImNhY2hlX2NyZWF0aW9uIjp7ImVwaGVtZXJhbF8xaF9pbnB1dF90b2tlbnMiOjAsImVwaGVtZXJhbF81bV9pbnB1dF90b2tlbnMiOjAsInZhbGlkIjp0cnVlfSwiY2FjaGVfY3JlYXRpb25faW5wdXRfdG9rZW5zIjowLCJjYWNoZV9yZWFkX2lucHV0X3Rva2VucyI6MCwiaW5wdXRfdG9rZW5zIjoxOSwib3V0cHV0X3Rva2VucyI6MTAsInNlcnZlcl90b29sX3VzZSI6bnVsbCwic2VydmljZV90aWVyIjoic3RhbmRhcmQiLCJ2YWxpZCI6dHJ1ZSwiaW5mZXJlbmNlX2dlbyI6Im5vdF9hdmFpbGFibGUifSwidmFsaWQiOnRydWV9SqABChNicmFpbnRydXN0Lm1ldGFkYXRhEogBCoUBeyJwcm92aWRlciI6ImFudGhyb3BpYyIsInJlcXVlc3RfcGF0aCI6InYxL21lc3NhZ2VzIiwibW9kZWwiOiJjbGF1ZGUtMy1oYWlrdS0yMDI0MDMwNyIsInJlcXVlc3RfYmFzZV91cmkiOiIiLCJyZXF1ZXN0X21ldGhvZCI6IlBPU1QifXoAhQEBAQAA"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 00:34:39 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "0df5b55b-adee-49fe-89cf-4e5b35ad4bb4",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a8cf9f000000001841bc8eb2cb0bc2",
-      "x-amz-apigw-id" : "ZuVg6HueoAMEf1A=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a8cf9f-0d1e615805cdc2153accf953;Parent=084bc5fd89584004;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 8e6c2cf5874f5e4093136cc3de4d856a.cloudfront.net (CloudFront), 1.1 d525041695bdb6325f78ebba5c11b8a2.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "maqeaKn1TWaa79JXufy6DEMc0PiTwgf7ACJ3iN_2SWud7JRpdY5r5Q=="
-    }
-  },
-  "uuid" : "d01e12fe-bf47-4ac6-b850-2731129652ce",
-  "persistent" : true,
-  "insertionIndex" : 112
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d2d1f78a-060f-4e26-9f02-5b2aa209cbab.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d2d1f78a-060f-4e26-9f02-5b2aa209cbab.json
deleted file mode 100644
index bd0e8c8f..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d2d1f78a-060f-4e26-9f02-5b2aa209cbab.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "d2d1f78a-060f-4e26-9f02-5b2aa209cbab",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:37:49 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "c3237363-cbde-4f3f-a99d-6f744cac2832",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9cd7d00000000436bf3a6806734e4",
-      "x-amz-apigw-id" : "Zw0LpHrJoAMElgQ=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9cd7d-2a0b20fd4d77876919c49304;Parent=39b8a2ef7b2b4844;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 db84db36e16ca0c80b0992006d731900.cloudfront.net (CloudFront), 1.1 d525041695bdb6325f78ebba5c11b8a2.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "DSlAZwpjdVY7_VwpQue0GfSuxiWM_99ZDnbOd89-rvK4Ay0i9g7sRw=="
-    }
-  },
-  "uuid" : "d2d1f78a-060f-4e26-9f02-5b2aa209cbab",
-  "persistent" : true,
-  "insertionIndex" : 130
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d3d2b346-0f64-441c-85f0-2e073ecf8442.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d3d2b346-0f64-441c-85f0-2e073ecf8442.json
deleted file mode 100644
index 4581e447..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d3d2b346-0f64-441c-85f0-2e073ecf8442.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "d3d2b346-0f64-441c-85f0-2e073ecf8442",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:52 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "3bf949d7-c6e7-444c-8a9b-e8c2ab997005",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549dc000000001a993c56b1cae2c7",
-      "x-amz-apigw-id" : "Y9h6gFHMoAMEuCA=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549dc-0c4a745b4970e2575cb61631;Parent=7dd0876470d6ef5d;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 59e4792b9d6184bfa491a317b36590d2.cloudfront.net (CloudFront), 1.1 4ac8d091dce10e726cfc5404bfed72b8.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "nL0dyMPETc6X9ji7_QzQCUpoGE7lG3u_NRAWSm0BAf9EwbZzYR7GvQ=="
-    }
-  },
-  "uuid" : "d3d2b346-0f64-441c-85f0-2e073ecf8442",
-  "persistent" : true,
-  "insertionIndex" : 93
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d446c200-01f2-4468-a9b9-bbf2ac66713b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d446c200-01f2-4468-a9b9-bbf2ac66713b.json
deleted file mode 100644
index 6ac709a0..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d446c200-01f2-4468-a9b9-bbf2ac66713b.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "d446c200-01f2-4468-a9b9-bbf2ac66713b",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:14:42 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "ad609e53-9fca-4316-80fa-8c3e385488d4",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9c812000000001f90aa2dad664777",
-      "x-amz-apigw-id" : "Zwwy_FAJoAMEjkQ=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9c812-100e21bd74ea922b157f8436;Parent=6a4927ba76d36e8f;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 2c24d855455b80190edd9e2dcdca3ee8.cloudfront.net (CloudFront), 1.1 fbb003dfc0617e3e058e3dac791dfd5a.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "L-Uhvas0ol3jZJeaXiq9ZFFwtwiu2XRxMAXfp4bNAJml9OFH8f_BnA=="
-    }
-  },
-  "uuid" : "d446c200-01f2-4468-a9b9-bbf2ac66713b",
-  "persistent" : true,
-  "insertionIndex" : 117
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d4e8140a-45ef-49ba-9415-7d484f57c35d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d4e8140a-45ef-49ba-9415-7d484f57c35d.json
new file mode 100644
index 00000000..f85e920f
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d4e8140a-45ef-49ba-9415-7d484f57c35d.json
@@ -0,0 +1,39 @@
+{
+  "id" : "d4e8140a-45ef-49ba-9415-7d484f57c35d",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : 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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNRDFq7IAMElog=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c26c-6bdd9e656dd845391c38b9ca;Parent=3c499e62564913a5;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:36 GMT",
+      "Via" : "1.1 db84db36e16ca0c80b0992006d731900.cloudfront.net (CloudFront), 1.1 a40ac7dad0e348fc93799233c9af5960.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26c00000000604ac0d1f34d0550",
+      "x-amzn-RequestId" : "5690ce9a-d458-4c56-ae81-3bc1e8fed7f8",
+      "X-Amz-Cf-Id" : "LK_WFtxNzrbgu6lJNb99TLOCkUUKRJ8YkQXoQpmSNvZZYfyNSNV7dQ==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "d4e8140a-45ef-49ba-9415-7d484f57c35d",
+  "persistent" : true,
+  "insertionIndex" : 51
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d6ffcad2-4e05-4263-8071-7a8afca93ed7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d6ffcad2-4e05-4263-8071-7a8afca93ed7.json
deleted file mode 100644
index ea677883..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d6ffcad2-4e05-4263-8071-7a8afca93ed7.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "d6ffcad2-4e05-4263-8071-7a8afca93ed7",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 18:35:37 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "b608a1f3-6632-4bc7-8507-662ab7c591c0",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9ccf8000000006e288884ac2a4f50",
-      "x-amz-apigw-id" : "Zwz27G-LoAMEc8g=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-69a9ccf8-40ee75683ef125f215934dfe;Parent=1fea54959cc61012;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 2d0eb1433209b25c3712ac0793d56bc0.cloudfront.net (CloudFront), 1.1 65f2e9f7f1475de54aa452d3ceb9bcf6.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "7cRpCBe5X9odkrUKhL8W23OQvGtm13THyhDawbNfptz4kt2I5nfQdg=="
-    }
-  },
-  "uuid" : "d6ffcad2-4e05-4263-8071-7a8afca93ed7",
-  "persistent" : true,
-  "insertionIndex" : 123
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d98e7a0b-453c-4c82-bfc5-eaa456eb6744.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d98e7a0b-453c-4c82-bfc5-eaa456eb6744.json
new file mode 100644
index 00000000..abde2d45
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-d98e7a0b-453c-4c82-bfc5-eaa456eb6744.json
@@ -0,0 +1,39 @@
+{
+  "id" : "d98e7a0b-453c-4c82-bfc5-eaa456eb6744",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : 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+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNXnFaSoAMEXdA=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c296-74e12b616bebd7a72521dddd;Parent=01cdf6bb9be4e6d4;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:03:19 GMT",
+      "Via" : "1.1 59e4792b9d6184bfa491a317b36590d2.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c296000000001131b88a2cfccddc",
+      "x-amzn-RequestId" : "b22b84c9-2b72-4634-9e77-62095944490e",
+      "X-Amz-Cf-Id" : "OpSYoq8eTpqOLPWwyH_PlPpPZZP2zVqSOl3bIwkyXiFP5Z12UgXNSQ==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "d98e7a0b-453c-4c82-bfc5-eaa456eb6744",
+  "persistent" : true,
+  "insertionIndex" : 137
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-dce37b28-875c-4bc9-808d-31d778c6a1c3.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-dce37b28-875c-4bc9-808d-31d778c6a1c3.json
new file mode 100644
index 00000000..f4b8c968
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-dce37b28-875c-4bc9-808d-31d778c6a1c3.json
@@ -0,0 +1,39 @@
+{
+  "id" : "dce37b28-875c-4bc9-808d-31d778c6a1c3",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
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+      "x-amz-apigw-id" : "bhN4DF2qIAMEbpQ=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c366-17eb717c587b6305535ac8b9;Parent=3c5047c3151c4184;Sampled=0;Lineage=1:24be3d11:0",
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+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c3660000000049cbebb9f3e66d8b",
+      "x-amzn-RequestId" : "d9e8b0e1-2a1a-4c37-b068-1c357334dc98",
+      "X-Amz-Cf-Id" : "OPIAiRKBiL6qcE4-RzUmh63bNAeWR1o9soTuCD0JHrMY08P6gL1EHA==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "dce37b28-875c-4bc9-808d-31d778c6a1c3",
+  "persistent" : true,
+  "insertionIndex" : 156
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-dd1e558d-523c-4189-bfd0-d1808c9a7233.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-dd1e558d-523c-4189-bfd0-d1808c9a7233.json
new file mode 100644
index 00000000..3abcc3fc
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-dd1e558d-523c-4189-bfd0-d1808c9a7233.json
@@ -0,0 +1,39 @@
+{
+  "id" : "dd1e558d-523c-4189-bfd0-d1808c9a7233",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
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+    } ]
+  },
+  "response" : {
+    "status" : 403,
+    "bodyFileName" : "otel_v1_traces-dd1e558d-523c-4189-bfd0-d1808c9a7233.json",
+    "headers" : {
+      "X-Cache" : "Error from cloudfront",
+      "x-amz-apigw-id" : "bhNUeEVioAMEhVw=",
+      "vary" : "Origin, Accept-Encoding",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c282-753861e01a53ef52175edac0;Parent=2d215db3033547fb;Sampled=0;Lineage=1:24be3d11:0",
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+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c282000000005868ea9bb6bc3400",
+      "x-amzn-RequestId" : "1eeb994a-9ce3-496b-8766-a96f02825f70",
+      "X-Amz-Cf-Id" : "XqMEAojmfWTE2TEp50MryxUTXALWyn1nUYR59k3XjETbC-zIQ5cUaQ==",
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+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "dd1e558d-523c-4189-bfd0-d1808c9a7233",
+  "persistent" : true,
+  "insertionIndex" : 1
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-de8bbca7-225e-419a-8ee5-4763f8cc58e6.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-de8bbca7-225e-419a-8ee5-4763f8cc58e6.json
deleted file mode 100644
index 550fbc67..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-de8bbca7-225e-419a-8ee5-4763f8cc58e6.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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-  "request" : {
-    "url" : "/otel/v1/traces",
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-    "headers" : {
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-  "response" : {
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-    "headers" : {
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-      "Date" : "Thu, 05 Mar 2026 18:35:40 GMT",
-      "access-control-allow-credentials" : "true",
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-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-decca387-2658-4070-88d1-26e0d3965af0.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-decca387-2658-4070-88d1-26e0d3965af0.json
deleted file mode 100644
index dbdd1e8c..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-decca387-2658-4070-88d1-26e0d3965af0.json
+++ /dev/null
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-{
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-e16cbe95-b83f-449c-882b-b4631a32812a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-e16cbe95-b83f-449c-882b-b4631a32812a.json
deleted file mode 100644
index ebaff861..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-e16cbe95-b83f-449c-882b-b4631a32812a.json
+++ /dev/null
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-  "request" : {
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deleted file mode 100644
index 3fd08453..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-e4274177-24ca-4683-b10a-eb0a0596c28a.json
+++ /dev/null
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ea795ac1-db7b-4709-b2ad-1252eb5b95aa.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ea795ac1-db7b-4709-b2ad-1252eb5b95aa.json
new file mode 100644
index 00000000..f0dd89dd
--- /dev/null
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@@ -0,0 +1,39 @@
+{
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+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ecd72a15-bc56-4af7-8f3a-ea007535f361.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ecd72a15-bc56-4af7-8f3a-ea007535f361.json
new file mode 100644
index 00000000..b61457e9
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@@ -0,0 +1,39 @@
+{
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+    } ]
+  },
+  "response" : {
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+    "headers" : {
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+      "x-amz-apigw-id" : "bhN2uHhSoAMEM3A=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ee4bc331-f9de-49c7-900b-39803a832a46.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ee4bc331-f9de-49c7-900b-39803a832a46.json
deleted file mode 100644
index 66628e48..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ee4bc331-f9de-49c7-900b-39803a832a46.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "ee4bc331-f9de-49c7-900b-39803a832a46",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
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-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
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-      "X-Amzn-Trace-Id" : "Root=1-69a9ce4f-0e74a9135238af86702f3fc5;Parent=5bc27fa2316b8ad5;Sampled=0;Lineage=1:24be3d11:0",
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-  "insertionIndex" : 136
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ee8f7fc6-a6b5-42f0-b8c3-be57dc4ab97e.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ee8f7fc6-a6b5-42f0-b8c3-be57dc4ab97e.json
deleted file mode 100644
index a58668d2..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ee8f7fc6-a6b5-42f0-b8c3-be57dc4ab97e.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "ee8f7fc6-a6b5-42f0-b8c3-be57dc4ab97e",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
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-    "bodyPatterns" : [ {
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-  },
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-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Thu, 05 Mar 2026 17:46:36 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "6a3841ea-6dab-43e1-b232-0c0c0d506f73",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "69a9c17c000000003d14782f0ac392ea",
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-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
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-  "uuid" : "ee8f7fc6-a6b5-42f0-b8c3-be57dc4ab97e",
-  "persistent" : true,
-  "insertionIndex" : 114
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f0e34c5f-d4f8-4895-9817-a3bcf742e1fc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f0e34c5f-d4f8-4895-9817-a3bcf742e1fc.json
new file mode 100644
index 00000000..5a069ab5
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f0e34c5f-d4f8-4895-9817-a3bcf742e1fc.json
@@ -0,0 +1,39 @@
+{
+  "id" : "f0e34c5f-d4f8-4895-9817-a3bcf742e1fc",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
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+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhN1WFCJoAMEp1g=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c355-266d58197ae43abd15e69af8;Parent=174a5b581a595174;Sampled=0;Lineage=1:24be3d11:0",
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+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c355000000002b0d88ae6c63ddab",
+      "x-amzn-RequestId" : "f32da955-61be-4721-9fa4-feb6546d57a8",
+      "X-Amz-Cf-Id" : "nExrtVA7erJcDIWe84Cm8evgccaZjfynoWY92PjUL-1poRuB62R3fg==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "f0e34c5f-d4f8-4895-9817-a3bcf742e1fc",
+  "persistent" : true,
+  "insertionIndex" : 152
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f33eb256-99f1-4cae-b9e7-cd186d466b81.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f33eb256-99f1-4cae-b9e7-cd186d466b81.json
deleted file mode 100644
index 04ab1ba9..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f33eb256-99f1-4cae-b9e7-cd186d466b81.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
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-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
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-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "2a35a161-fe13-4b7b-b13b-929778094332",
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f397e619-e9ce-4b52-9fc3-609533d463ca.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f397e619-e9ce-4b52-9fc3-609533d463ca.json
deleted file mode 100644
index daba09fb..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f397e619-e9ce-4b52-9fc3-609533d463ca.json
+++ /dev/null
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f6e842fa-7668-4745-9e16-1b30ef81ef43.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f6e842fa-7668-4745-9e16-1b30ef81ef43.json
deleted file mode 100644
index 3925ec9c..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f6e842fa-7668-4745-9e16-1b30ef81ef43.json
+++ /dev/null
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f90a8bb2-65c9-4689-ae2e-0c41579fdb50.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f90a8bb2-65c9-4689-ae2e-0c41579fdb50.json
new file mode 100644
index 00000000..896a75db
--- /dev/null
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@@ -0,0 +1,39 @@
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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNSREkFIAMEg_A=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c274-5b6691757a80bd224e753811;Parent=338de17c224bb32c;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:44 GMT",
+      "Via" : "1.1 6281593da0ade6742b2f405f2b9ea0ba.cloudfront.net (CloudFront), 1.1 566cc276dff9847158a5a9854be4df42.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c27400000000223987baee674668",
+      "x-amzn-RequestId" : "01fbac78-3a05-4d61-b3d6-c2cdbd6f86d9",
+      "X-Amz-Cf-Id" : "8vA5DIneSkYyH6ZbEdvK7uIyzv0CcmYlAGKAnmPEiMGgus6hKaNCzw==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "f90a8bb2-65c9-4689-ae2e-0c41579fdb50",
+  "persistent" : true,
+  "insertionIndex" : 32
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f94211b9-c1a4-46d4-bef3-b30760ea3a5d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f94211b9-c1a4-46d4-bef3-b30760ea3a5d.json
deleted file mode 100644
index af8de2b6..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f94211b9-c1a4-46d4-bef3-b30760ea3a5d.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "f94211b9-c1a4-46d4-bef3-b30760ea3a5d",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 403,
-    "bodyFileName" : "otel_v1_traces-f94211b9-c1a4-46d4-bef3-b30760ea3a5d.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:11:04 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "183c82ad-2c9c-4437-b5c8-10906adc80aa",
-      "x-bt-internal-trace-id" : "699549e8000000005de7de1125c2fb42",
-      "x-amz-apigw-id" : "Y9h8VFJPIAMElrw=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"13b-hn+NhXQ+iN6jtCTkkOGjmB6RJp8\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549e8-1c7dc4e6406ca16437fa7d2c;Parent=212f55b0ba4912c1;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 a642518ef4d5fb78c3190de112922a38.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
-      "X-Cache" : "Error from cloudfront",
-      "X-Amz-Cf-Id" : "mgBHLmqpDZIKka8vu9wxHkjpyJDgvjugKlIvNe_aLGdhT8mVqEVjoA=="
-    }
-  },
-  "uuid" : "f94211b9-c1a4-46d4-bef3-b30760ea3a5d",
-  "persistent" : true,
-  "insertionIndex" : 103
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f983c72a-3478-41af-8c69-26a95933fc8d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f983c72a-3478-41af-8c69-26a95933fc8d.json
new file mode 100644
index 00000000..a9d817ec
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-f983c72a-3478-41af-8c69-26a95933fc8d.json
@@ -0,0 +1,39 @@
+{
+  "id" : "f983c72a-3478-41af-8c69-26a95933fc8d",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNxcEnzoAMEVgA=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c33c-6cba6fc93201e09175660615;Parent=648b508ffa77f22b;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:06:04 GMT",
+      "Via" : "1.1 d118b2ea8414d381f46f91331ab67f02.cloudfront.net (CloudFront), 1.1 da32b45f2cc22dc818960285c4e91b66.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c33c0000000036c1b531f8ccacef",
+      "x-amzn-RequestId" : "7ceb5a91-3a20-41cf-8591-aa52587976bb",
+      "X-Amz-Cf-Id" : "tRrVcXT3WPFaT7DV5968itNqKzKtOtAJjZmZrt1MrDORTXK49Qy1gw==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "f983c72a-3478-41af-8c69-26a95933fc8d",
+  "persistent" : true,
+  "insertionIndex" : 147
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-fd1434f5-1c56-4d1c-8a0e-446b3b646fa0.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-fd1434f5-1c56-4d1c-8a0e-446b3b646fa0.json
deleted file mode 100644
index 2db3cf80..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-fd1434f5-1c56-4d1c-8a0e-446b3b646fa0.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "fd1434f5-1c56-4d1c-8a0e-446b3b646fa0",
-  "name" : "otel_v1_traces",
-  "request" : {
-    "url" : "/otel/v1/traces",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/x-protobuf"
-      }
-    },
-    "bodyPatterns" : [ {
-      "binaryEqualTo" : "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"
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "headers" : {
-      "Content-Type" : "application/x-protobuf",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:11:00 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "6a8cb33b-77b1-44f3-83e0-fd9f815e1d3a",
-      "x-amzn-Remapped-content-length" : "0",
-      "x-bt-internal-trace-id" : "699549e4000000001dd2a63151d0d206",
-      "x-amz-apigw-id" : "Y9h7tGVKIAMEWTg=",
-      "vary" : "Origin",
-      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
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-  "uuid" : "fd1434f5-1c56-4d1c-8a0e-446b3b646fa0",
-  "persistent" : true,
-  "insertionIndex" : 98
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ff079568-19b8-47a9-9f4b-7dd1d20a1577.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ff079568-19b8-47a9-9f4b-7dd1d20a1577.json
new file mode 100644
index 00000000..6d96d033
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/otel_v1_traces-ff079568-19b8-47a9-9f4b-7dd1d20a1577.json
@@ -0,0 +1,39 @@
+{
+  "id" : "ff079568-19b8-47a9-9f4b-7dd1d20a1577",
+  "name" : "otel_v1_traces",
+  "request" : {
+    "url" : "/otel/v1/traces",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/x-protobuf"
+      }
+    },
+    "bodyPatterns" : [ {
+      "binaryEqualTo" : "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"
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNQwExXIAMEkGQ=",
+      "vary" : "Origin",
+      "x-amzn-Remapped-content-length" : "0",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c26a-12485fa849651f9e7a66677e;Parent=0af696bd1c5449f9;Sampled=0;Lineage=1:24be3d11:0",
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+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26a00000000423e22a07542df83",
+      "x-amzn-RequestId" : "ca27588d-4d46-4454-bb15-1c662872174a",
+      "X-Amz-Cf-Id" : "O7wf13F98A2FSit6s2GevQxKnsQTrx2Mfr-IROy9MszJe7-F0_WpKQ==",
+      "etag" : "W/\"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk\"",
+      "Content-Type" : "application/x-protobuf"
+    }
+  },
+  "uuid" : "ff079568-19b8-47a9-9f4b-7dd1d20a1577",
+  "persistent" : true,
+  "insertionIndex" : 57
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset-36b6fd87-82a6-4dd2-b0b1-648041a594ce.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset-36b6fd87-82a6-4dd2-b0b1-648041a594ce.json
new file mode 100644
index 00000000..4207a9f4
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset-36b6fd87-82a6-4dd2-b0b1-648041a594ce.json
@@ -0,0 +1,44 @@
+{
+  "id" : "36b6fd87-82a6-4dd2-b0b1-648041a594ce",
+  "name" : "v1_dataset",
+  "request" : {
+    "urlPath" : "/v1/dataset",
+    "method" : "GET",
+    "queryParameters" : {
+      "project_name" : {
+        "hasExactly" : [ {
+          "equalTo" : "java-unit-test"
+        } ]
+      },
+      "dataset_name" : {
+        "hasExactly" : [ {
+          "equalTo" : "food"
+        } ]
+      }
+    }
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_dataset-36b6fd87-82a6-4dd2-b0b1-648041a594ce.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNPbGMlIAMELNQ=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "294",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c262-5676d57056b26bfe2c74cca6;Parent=2b7c3c1e80cf4540;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:26 GMT",
+      "Via" : "1.1 b47176981720d8607d309e56e9510316.cloudfront.net (CloudFront), 1.1 83d24992402f7b214901ab76fbdc11e2.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26200000000633ea9ac1fe5aaaa",
+      "x-amzn-RequestId" : "0b238552-e6cf-402c-8bbe-e2d3ad2a2a88",
+      "X-Amz-Cf-Id" : "2woIvZh4ieOQBgRHy3Fx6ne6bsczgNzCV3Rc8tq7-Eme_lBhTmrY7g==",
+      "etag" : "W/\"126-KoKFpc1UH9prgBUFohvp8HRiPDA\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "36b6fd87-82a6-4dd2-b0b1-648041a594ce",
+  "persistent" : true,
+  "insertionIndex" : 77
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset-4aee3b04-16ec-41e1-b008-e824d594ac7a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset-4aee3b04-16ec-41e1-b008-e824d594ac7a.json
deleted file mode 100644
index 9b010780..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset-4aee3b04-16ec-41e1-b008-e824d594ac7a.json
+++ /dev/null
@@ -1,32 +0,0 @@
-{
-  "id" : "4aee3b04-16ec-41e1-b008-e824d594ac7a",
-  "name" : "v1_dataset",
-  "request" : {
-    "url" : "/v1/dataset?project_name=java-unit-test&dataset_name=food",
-    "method" : "GET"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_dataset-4aee3b04-16ec-41e1-b008-e824d594ac7a.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:14 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "0b3b1839-eec8-4edd-aa81-cc162facaf33",
-      "x-amzn-Remapped-content-length" : "282",
-      "x-bt-internal-trace-id" : "699549b6000000004485829930e45777",
-      "x-amz-apigw-id" : "Y9h0hFcJoAMEQ4w=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"11a-VTu/kyvc23XF0GPfrJpypCH3or0\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549b6-5d1113503670e5f96629b7de;Parent=6b050fe4dfcba2bd;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 5e599a9eda8861379cfef6a522da18e4.cloudfront.net (CloudFront), 1.1 77f3c89ffd619275648d49ad13868570.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "jteU7AL_kvEERSacgPfNeD0UtnZl4CkFSF_VCPfUtXUKqtaWdFl5HA=="
-    }
-  },
-  "uuid" : "4aee3b04-16ec-41e1-b008-e824d594ac7a",
-  "persistent" : true,
-  "insertionIndex" : 23
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-b73618be-c744-4247-8712-14ede41ce09d.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-c6714654-d22e-4f3a-8e88-899791466902.json
similarity index 51%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-b73618be-c744-4247-8712-14ede41ce09d.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-c6714654-d22e-4f3a-8e88-899791466902.json
index d9bcb0e5..c55b64ad 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-b73618be-c744-4247-8712-14ede41ce09d.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-c6714654-d22e-4f3a-8e88-899791466902.json
@@ -1,5 +1,5 @@
 {
-  "id" : "b73618be-c744-4247-8712-14ede41ce09d",
+  "id" : "c6714654-d22e-4f3a-8e88-899791466902",
   "name" : "v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch",
   "request" : {
     "url" : "/v1/dataset/0855b29c-69ba-4f98-9154-61a40334a492/fetch",
@@ -17,26 +17,26 @@
   },
   "response" : {
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-    "bodyFileName" : "v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-b73618be-c744-4247-8712-14ede41ce09d.json",
+    "bodyFileName" : "v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-c6714654-d22e-4f3a-8e88-899791466902.json",
     "headers" : {
-      "Content-Type" : "application/json",
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNQFEsMIAMEMYw=",
+      "vary" : "Origin",
       "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:17 GMT",
+      "x-bt-brainstore-duration-ms" : "112",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c266-4d5c5dd227ac634220a62748;Parent=3b546c5f31bbbe1b;Sampled=0;Lineage=1:24be3d11:0",
+      "x-bt-api-duration-ms" : "120",
+      "Date" : "Wed, 08 Apr 2026 21:02:30 GMT",
+      "Via" : "1.1 e1832834d17ab65dd955f4e68cc524e6.cloudfront.net (CloudFront), 1.1 a53bab1af200813b8f27e3c0a28b4964.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
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-      "x-bt-brainstore-duration-ms" : "89",
-      "x-bt-api-duration-ms" : "94",
-      "x-bt-internal-trace-id" : "699549b9000000005fc5b04ad0bb37d5",
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-      "X-Amz-Cf-Id" : "0a_aCgIZwrXgQzJaiID_ko6DEQctGYmxcc4H-EH3yplMPVVEh884vQ=="
+      "x-bt-internal-trace-id" : "69d6c26600000000533cd135bcb958d2",
+      "x-amzn-RequestId" : "6363ff1c-62b2-4b4c-b9ed-1eddc3b68a5b",
+      "X-Amz-Cf-Id" : "5_15HmJSDo8VZ4Q-pipxwcxOtijkc_0K7_pK0xn3gu9_VIqsYOKhYg==",
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     }
   },
-  "uuid" : "b73618be-c744-4247-8712-14ede41ce09d",
+  "uuid" : "c6714654-d22e-4f3a-8e88-899791466902",
   "persistent" : true,
-  "insertionIndex" : 30
+  "insertionIndex" : 70
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-99de4385-409a-45c7-865d-a1b1f36e2aca.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-fc18a4bd-c916-44d4-b57c-07cd0de0b62e.json
similarity index 51%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-99de4385-409a-45c7-865d-a1b1f36e2aca.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-fc18a4bd-c916-44d4-b57c-07cd0de0b62e.json
index 79869ee5..89cd2c85 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-99de4385-409a-45c7-865d-a1b1f36e2aca.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_dataset_0855b29c-69ba-4f98-9154-61a40334a492_fetch-fc18a4bd-c916-44d4-b57c-07cd0de0b62e.json
@@ -1,5 +1,5 @@
 {
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-0d4dc344-768e-488a-8d8e-984f8cbe702f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-0d4dc344-768e-488a-8d8e-984f8cbe702f.json
new file mode 100644
index 00000000..f3a5f34c
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+{
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+  "name" : "v1_experiment",
+  "request" : {
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-3489b79c-cf53-4698-a449-61c14e2f24a7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-3489b79c-cf53-4698-a449-61c14e2f24a7.json
new file mode 100644
index 00000000..92ad355c
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+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-3489b79c-cf53-4698-a449-61c14e2f24a7.json
@@ -0,0 +1,45 @@
+{
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+  "name" : "v1_experiment",
+  "request" : {
+    "url" : "/v1/experiment",
+    "method" : "POST",
+    "headers" : {
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-361b5793-900f-4546-9eb3-b7581448c646.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-361b5793-900f-4546-9eb3-b7581448c646.json
deleted file mode 100644
index dd85d911..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-361b5793-900f-4546-9eb3-b7581448c646.json
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new file mode 100644
index 00000000..2e1c3c50
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@@ -0,0 +1,42 @@
+{
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+  "name" : "v1_experiment",
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\ No newline at end of file
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deleted file mode 100644
index 721039b0..00000000
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new file mode 100644
index 00000000..3a52259d
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@@ -0,0 +1,42 @@
+{
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deleted file mode 100644
index 29ccadeb..00000000
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deleted file mode 100644
index 959ab22a..00000000
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-7e9c701b-c166-4826-b68e-657961e72cb3.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-7e9c701b-c166-4826-b68e-657961e72cb3.json
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new file mode 100644
index 00000000..887c26de
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@@ -0,0 +1,42 @@
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new file mode 100644
index 00000000..1f104dbd
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@@ -0,0 +1,41 @@
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-866ca888-2c28-44a5-9240-b271f53156dd.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_experiment-866ca888-2c28-44a5-9240-b271f53156dd.json
new file mode 100644
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@@ -0,0 +1,42 @@
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new file mode 100644
index 00000000..b033cb71
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index 00000000..e4389e64
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new file mode 100644
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@@ -0,0 +1,42 @@
+{
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new file mode 100644
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deleted file mode 100644
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-028d85c8-054b-4d4d-ab6d-aad6244a4452.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-028d85c8-054b-4d4d-ab6d-aad6244a4452.json
new file mode 100644
index 00000000..a4601421
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+{
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+  "request" : {
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+    "method" : "GET",
+    "queryParameters" : {
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+          "equalTo" : "java-unit-test"
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+  "response" : {
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+    "bodyFileName" : "v1_function-028d85c8-054b-4d4d-ab6d-aad6244a4452.json",
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-4fa523fc-d1d8-4510-927c-6b4b2ba30e14.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-4fa523fc-d1d8-4510-927c-6b4b2ba30e14.json
new file mode 100644
index 00000000..1456e78f
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+{
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-91ab301a-75af-4652-9299-9378bacb06b8.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-91ab301a-75af-4652-9299-9378bacb06b8.json
new file mode 100644
index 00000000..d6342fb3
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@@ -0,0 +1,49 @@
+{
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+    "queryParameters" : {
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-a316701b-03a4-4d2b-8dc9-8f4659835637.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-a316701b-03a4-4d2b-8dc9-8f4659835637.json
deleted file mode 100644
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--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-a316701b-03a4-4d2b-8dc9-8f4659835637.json
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deleted file mode 100644
index 2ed8ef48..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-af89083b-16ea-4f01-942a-949b9c98238b.json
+++ /dev/null
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deleted file mode 100644
index 3ff7bf3a..00000000
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-c087c5c6-563e-48a9-8196-ab4a68f43908.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-c087c5c6-563e-48a9-8196-ab4a68f43908.json
new file mode 100644
index 00000000..9ad63cea
--- /dev/null
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+{
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+  "name" : "v1_function",
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+    "method" : "GET",
+    "queryParameters" : {
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+      },
+      "project_name" : {
+        "hasExactly" : [ {
+          "equalTo" : "java-unit-test"
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+  "response" : {
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+    "bodyFileName" : "v1_function-c087c5c6-563e-48a9-8196-ab4a68f43908.json",
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+  "scenarioName" : "scenario-6-v1-function",
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+  "newScenarioState" : "scenario-6-v1-function-2",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-cf058665-dcbe-446c-af0e-cf70e29aba8c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-cf058665-dcbe-446c-af0e-cf70e29aba8c.json
new file mode 100644
index 00000000..9166b870
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-cf058665-dcbe-446c-af0e-cf70e29aba8c.json
@@ -0,0 +1,46 @@
+{
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+  "name" : "v1_function",
+  "request" : {
+    "urlPath" : "/v1/function",
+    "method" : "GET",
+    "queryParameters" : {
+      "slug" : {
+        "hasExactly" : [ {
+          "equalTo" : "typescriptexactmatch-9e44"
+        } ]
+      },
+      "project_name" : {
+        "hasExactly" : [ {
+          "equalTo" : "java-unit-test"
+        } ]
+      }
+    }
+  },
+  "response" : {
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+    "bodyFileName" : "v1_function-cf058665-dcbe-446c-af0e-cf70e29aba8c.json",
+    "headers" : {
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+      "x-bt-internal-trace-id" : "69d6c2770000000066a4cfb44f6b3b04",
+      "x-amzn-RequestId" : "45162ea5-fbb0-4a6a-a1dc-dca84dfcd1ec",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-e3222bb0-ef62-44af-bdf0-d719e2afc47c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-e3222bb0-ef62-44af-bdf0-d719e2afc47c.json
deleted file mode 100644
index 75995275..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-e3222bb0-ef62-44af-bdf0-d719e2afc47c.json
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-f3575367-9fa6-4747-a2d0-b78c4511a93c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-f3575367-9fa6-4747-a2d0-b78c4511a93c.json
deleted file mode 100644
index 0f8de262..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function-f3575367-9fa6-4747-a2d0-b78c4511a93c.json
+++ /dev/null
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-{
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-5d8f9b94-4a59-46b7-8013-1bc5ceb1ddb6.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-5d8f9b94-4a59-46b7-8013-1bc5ceb1ddb6.json
new file mode 100644
index 00000000..d2fe2774
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-5d8f9b94-4a59-46b7-8013-1bc5ceb1ddb6.json
@@ -0,0 +1,34 @@
+{
+  "id" : "5d8f9b94-4a59-46b7-8013-1bc5ceb1ddb6",
+  "name" : "v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277",
+  "request" : {
+    "url" : "/v1/function/5dd8a26d-3be8-4ecd-af5b-df2a6a592277",
+    "method" : "GET"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-5d8f9b94-4a59-46b7-8013-1bc5ceb1ddb6.json",
+    "headers" : {
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+  "uuid" : "5d8f9b94-4a59-46b7-8013-1bc5ceb1ddb6",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-8e6b1644-a5b0-4fbd-99c7-1f217bdff0e8.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-8e6b1644-a5b0-4fbd-99c7-1f217bdff0e8.json
new file mode 100644
index 00000000..960909c9
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@@ -0,0 +1,35 @@
+{
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+  "name" : "v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277",
+  "request" : {
+    "url" : "/v1/function/5dd8a26d-3be8-4ecd-af5b-df2a6a592277",
+    "method" : "GET"
+  },
+  "response" : {
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+      "x-bt-internal-trace-id" : "69d6c279000000001fc0bffb716ae1dc",
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+  },
+  "uuid" : "8e6b1644-a5b0-4fbd-99c7-1f217bdff0e8",
+  "persistent" : true,
+  "scenarioName" : "scenario-4-v1-function-5dd8a26d-3be8-4ecd-af5b-df2a6a592277",
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+  "newScenarioState" : "scenario-4-v1-function-5dd8a26d-3be8-4ecd-af5b-df2a6a592277-2",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-c5646793-e06f-4331-8cfe-a868c55a8541.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277-c5646793-e06f-4331-8cfe-a868c55a8541.json
deleted file mode 100644
index 9d7c4a16..00000000
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similarity index 57%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-cb9a8550-fa8c-4384-a679-ec28ecc7fd21.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_5dd8a26d-3be8-4ecd-af5b-df2a6a592277_invoke-3387b4d6-99fa-42bf-be42-0599b09b01b7.json
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similarity index 54%
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index 775c534d..b62badcc 100644
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+      "x-amzn-RequestId" : "0b3a57fe-3d63-4e92-87a0-c8422d6bd383",
+      "X-Amz-Cf-Id" : "5pNnaeqNsQAObbfZQvWleI_5rrFrqIux7Z7e8pmGLk4lw4RuH53dfA==",
       "etag" : "W/\"383-rpJVBmKrFDirLJWf8+TFyK5s3tg\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549a6-3f09f44a559d93bd00260485;Parent=2bdd7e351023bce6;Sampled=0;Lineage=1:24be3d11:0",
-      "Via" : "1.1 5e599a9eda8861379cfef6a522da18e4.cloudfront.net (CloudFront), 1.1 e82f2bd1d85893fad1abb144337e7368.cloudfront.net (CloudFront)",
-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "24i95Z9_LdorUx4roT2WklECyqWVvrT9q81BTEGlCORszSqip1I2uA=="
+      "Content-Type" : "application/json; charset=utf-8"
     }
   },
-  "uuid" : "cdf9cefb-6fee-4cf9-ab41-01838207d25d",
+  "uuid" : "bff98de5-1dbc-48b2-ad9a-1985e8dc6107",
   "persistent" : true,
   "scenarioName" : "scenario-3-v1-function-efa5f9c3-6ece-4726-a9d6-4ba792980b3f",
   "requiredScenarioState" : "Started",
   "newScenarioState" : "scenario-3-v1-function-efa5f9c3-6ece-4726-a9d6-4ba792980b3f-2",
-  "insertionIndex" : 4
+  "insertionIndex" : 101
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-3c7b91b0-9c77-4f69-95e5-46b6b813e494.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-49895de4-03c7-4fdc-850e-b49d6e3f8a72.json
similarity index 58%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-3c7b91b0-9c77-4f69-95e5-46b6b813e494.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-49895de4-03c7-4fdc-850e-b49d6e3f8a72.json
index b9b5cd37..808ccf43 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-3c7b91b0-9c77-4f69-95e5-46b6b813e494.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-49895de4-03c7-4fdc-850e-b49d6e3f8a72.json
@@ -1,5 +1,5 @@
 {
-  "id" : "3c7b91b0-9c77-4f69-95e5-46b6b813e494",
+  "id" : "49895de4-03c7-4fdc-850e-b49d6e3f8a72",
   "name" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke",
   "request" : {
     "url" : "/v1/function/efa5f9c3-6ece-4726-a9d6-4ba792980b3f/invoke",
@@ -17,21 +17,21 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-3c7b91b0-9c77-4f69-95e5-46b6b813e494.json",
+    "bodyFileName" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-49895de4-03c7-4fdc-850e-b49d6e3f8a72.json",
     "headers" : {
-      "Content-Type" : "application/json",
-      "Date" : "Wed, 18 Feb 2026 05:10:33 GMT",
-      "X-Amzn-Trace-Id" : "Root=1-699549c9-56ffeb50283849b532754a94;Parent=763932532dcf5e4b;Sampled=0;Lineage=1:8be8f50d:0",
-      "x-bt-function-meta-cached" : "HIT",
-      "x-amzn-RequestId" : "ae2aef28-ccef-4600-a7d9-688688563827",
-      "x-bt-function-creds-cached" : "HIT",
       "X-Cache" : "Miss from cloudfront",
-      "Via" : "1.1 a624be98cd5b264f373d8ac17f78ee50.cloudfront.net (CloudFront)",
       "X-Amz-Cf-Pop" : "SEA900-P10",
-      "X-Amz-Cf-Id" : "p-cXNkWqWlPHxC5iuOl-iqoButRW8HAuCSC6yzdw9gYBVx1-CFh5UA=="
+      "x-amzn-RequestId" : "6082c2d9-ef50-469e-9070-a4e7e98debed",
+      "X-Amz-Cf-Id" : "S6c7XrPkclDw-x_Sph8yGHErrpI3pspI5IjP_7-qJN0GJ-cK53tumw==",
+      "x-bt-function-creds-cached" : "HIT",
+      "x-bt-function-meta-cached" : "HIT",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c276-6948e34c213655202a2eb0c5;Parent=24ba8ee141ec4146;Sampled=0;Lineage=1:8be8f50d:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:46 GMT",
+      "Via" : "1.1 b669d9add7767f73665f1f8b7e8cd802.cloudfront.net (CloudFront)",
+      "Content-Type" : "application/json"
     }
   },
-  "uuid" : "3c7b91b0-9c77-4f69-95e5-46b6b813e494",
+  "uuid" : "49895de4-03c7-4fdc-850e-b49d6e3f8a72",
   "persistent" : true,
-  "insertionIndex" : 68
+  "insertionIndex" : 27
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-ecb8d96e-bdf2-4165-92fd-1bde7494f186.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-56eb6751-958b-43ef-a244-a36c39bee0c6.json
similarity index 52%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-ecb8d96e-bdf2-4165-92fd-1bde7494f186.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-56eb6751-958b-43ef-a244-a36c39bee0c6.json
index 484f3fb3..08d81107 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-ecb8d96e-bdf2-4165-92fd-1bde7494f186.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-56eb6751-958b-43ef-a244-a36c39bee0c6.json
@@ -1,5 +1,5 @@
 {
-  "id" : "ecb8d96e-bdf2-4165-92fd-1bde7494f186",
+  "id" : "56eb6751-958b-43ef-a244-a36c39bee0c6",
   "name" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke",
   "request" : {
     "url" : "/v1/function/efa5f9c3-6ece-4726-a9d6-4ba792980b3f/invoke",
@@ -10,30 +10,30 @@
       }
     },
     "bodyPatterns" : [ {
-      "equalToJson" : "{\"input\":{\"input\":\"carrot\",\"output\":\"java-fruit\",\"expected\":\"vegetable\",\"metadata\":{}},\"parent\":{\"object_type\":\"playground_logs\",\"object_id\":\"ceea7422-3507-4d1c-a5f7-7acf41d9fac2\",\"row_ids\":{\"id\":\"otel\",\"span_id\":\"6290375b3f2213f1\",\"root_span_id\":\"684edeca82d7effdbce6fb922b964421\"}}}",
+      "equalToJson" : "{\"input\":{\"input\":\"carrot\",\"output\":\"java-fruit\",\"expected\":\"vegetable\",\"metadata\":{}},\"parent\":{\"object_type\":\"playground_logs\",\"object_id\":\"ceea7422-3507-4d1c-a5f7-7acf41d9fac2\",\"row_ids\":{\"id\":\"otel\",\"span_id\":\"c8925161e2f2d7d9\",\"root_span_id\":\"d8aa50f5880aac343ef2a73eaf4fc9c5\"}}}",
       "ignoreArrayOrder" : true,
       "ignoreExtraElements" : false
     } ]
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-ecb8d96e-bdf2-4165-92fd-1bde7494f186.json",
+    "bodyFileName" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-56eb6751-958b-43ef-a244-a36c39bee0c6.json",
     "headers" : {
-      "Content-Type" : "application/json",
-      "Date" : "Wed, 18 Feb 2026 05:10:08 GMT",
-      "X-Amzn-Trace-Id" : "Root=1-699549ae-2c74bbf26f998e8c0a6dd1bc;Parent=1102ebc64e794b2c;Sampled=0;Lineage=1:8be8f50d:0",
-      "x-bt-function-meta-cached" : "HIT",
-      "x-amzn-RequestId" : "ceb793de-9e07-492e-a154-77c6bd73cc87",
-      "x-bt-span-export" : "AwMDAc7qdCI1B00cpfd6z0HZ+sICEVxhfosGTKKPlwJIPZAdNgNheLwQgRZFc7B7tl5mkzuweyJwcm9wYWdhdGVkX2V2ZW50Ijp7InNwYW5fYXR0cmlidXRlcyI6eyJwdXJwb3NlIjoic2NvcmVyIn19LCJyb290X3NwYW5faWQiOiI2ODRlZGVjYTgyZDdlZmZkYmNlNmZiOTIyYjk2NDQyMSJ9",
-      "x-bt-span-id" : "115c617e-8b06-4ca2-8f97-02483d901d36",
-      "x-bt-function-creds-cached" : "HIT",
       "X-Cache" : "Miss from cloudfront",
-      "Via" : "1.1 d525041695bdb6325f78ebba5c11b8a2.cloudfront.net (CloudFront)",
       "X-Amz-Cf-Pop" : "SEA900-P10",
-      "X-Amz-Cf-Id" : "1cJUsWk2JEe4GdKKYtLL0k4WvY6KSaSV5LEJj9YYA6Rrb1h7OOC2Lw=="
+      "x-bt-function-creds-cached" : "HIT",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c25a-1b24a231273b251178df6e9f;Parent=09e2597eb9ffffee;Sampled=0;Lineage=1:8be8f50d:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:18 GMT",
+      "Via" : "1.1 65f2e9f7f1475de54aa452d3ceb9bcf6.cloudfront.net (CloudFront)",
+      "x-bt-span-export" : "AwMDAc7qdCI1B00cpfd6z0HZ+sIC/x7a/mNnRuuTM0KSgEU4sQOHiPfRR7xDlZKjdjamJPv0eyJwcm9wYWdhdGVkX2V2ZW50Ijp7InNwYW5fYXR0cmlidXRlcyI6eyJwdXJwb3NlIjoic2NvcmVyIn19LCJyb290X3NwYW5faWQiOiJkOGFhNTBmNTg4MGFhYzM0M2VmMmE3M2VhZjRmYzljNSJ9",
+      "x-amzn-RequestId" : "3d8c9205-171d-42cc-bce2-97ac7a6b8189",
+      "X-Amz-Cf-Id" : "xz7bYpljNiYKFE6feFh42juHq28wxXJj7vBxoVizFhTpZ5EuDUAXXQ==",
+      "x-bt-span-id" : "ff1edafe-6367-46eb-9333-4292804538b1",
+      "x-bt-function-meta-cached" : "HIT",
+      "Content-Type" : "application/json"
     }
   },
-  "uuid" : "ecb8d96e-bdf2-4165-92fd-1bde7494f186",
+  "uuid" : "56eb6751-958b-43ef-a244-a36c39bee0c6",
   "persistent" : true,
-  "insertionIndex" : 12
+  "insertionIndex" : 94
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-8e5d7f5e-2ad9-4178-9806-6532dc588f57.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-8e5d7f5e-2ad9-4178-9806-6532dc588f57.json
deleted file mode 100644
index 50db33c4..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-8e5d7f5e-2ad9-4178-9806-6532dc588f57.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "id" : "8e5d7f5e-2ad9-4178-9806-6532dc588f57",
-  "name" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke",
-  "request" : {
-    "url" : "/v1/function/efa5f9c3-6ece-4726-a9d6-4ba792980b3f/invoke",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"input\":{\"input\":\"apple\",\"output\":\"java-fruit\",\"expected\":\"fruit\",\"metadata\":{}},\"parent\":{\"object_type\":\"playground_logs\",\"object_id\":\"ceea7422-3507-4d1c-a5f7-7acf41d9fac2\",\"row_ids\":{\"id\":\"otel\",\"span_id\":\"43af32538338972f\",\"root_span_id\":\"455b4f9da2515f3d1b97b8169de816c5\"}}}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-8e5d7f5e-2ad9-4178-9806-6532dc588f57.json",
-    "headers" : {
-      "Content-Type" : "application/json",
-      "Date" : "Wed, 18 Feb 2026 05:10:05 GMT",
-      "X-Amzn-Trace-Id" : "Root=1-699549a9-32dabe07748848dc0a74f94f;Parent=4bcdea5c1887b176;Sampled=0;Lineage=1:8be8f50d:0",
-      "x-bt-function-meta-cached" : "MISS",
-      "x-amzn-RequestId" : "d075665a-97ba-4bd1-b412-a991e3f4cb9c",
-      "x-bt-span-export" : "AwMDAc7qdCI1B00cpfd6z0HZ+sICJyJg6+B1ShCHAOxtPTv5mwOERxEIxghKb6RdF11nmp6QeyJwcm9wYWdhdGVkX2V2ZW50Ijp7InNwYW5fYXR0cmlidXRlcyI6eyJwdXJwb3NlIjoic2NvcmVyIn19LCJyb290X3NwYW5faWQiOiI0NTViNGY5ZGEyNTE1ZjNkMWI5N2I4MTY5ZGU4MTZjNSJ9",
-      "x-bt-span-id" : "272260eb-e075-4a10-8700-ec6d3d3bf99b",
-      "x-bt-function-creds-cached" : "MISS",
-      "X-Cache" : "Miss from cloudfront",
-      "Via" : "1.1 73b0c4a85645a8031ba157e0b3e28ffc.cloudfront.net (CloudFront)",
-      "X-Amz-Cf-Pop" : "SEA900-P10",
-      "X-Amz-Cf-Id" : "TqbKHKuKnldNfMyW2JMfgVpms3NVB1003Dj0NaVSOWtGeArFPf_4CA=="
-    }
-  },
-  "uuid" : "8e5d7f5e-2ad9-4178-9806-6532dc588f57",
-  "persistent" : true,
-  "insertionIndex" : 10
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b6e869f8-71a5-4013-8c2f-fa5fea4cfa03.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b80137f6-7734-4f0c-ba03-d71c58fcf51d.json
similarity index 58%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b6e869f8-71a5-4013-8c2f-fa5fea4cfa03.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b80137f6-7734-4f0c-ba03-d71c58fcf51d.json
index 7892636e..5744a049 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b6e869f8-71a5-4013-8c2f-fa5fea4cfa03.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b80137f6-7734-4f0c-ba03-d71c58fcf51d.json
@@ -1,5 +1,5 @@
 {
-  "id" : "b6e869f8-71a5-4013-8c2f-fa5fea4cfa03",
+  "id" : "b80137f6-7734-4f0c-ba03-d71c58fcf51d",
   "name" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke",
   "request" : {
     "url" : "/v1/function/efa5f9c3-6ece-4726-a9d6-4ba792980b3f/invoke",
@@ -17,21 +17,21 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b6e869f8-71a5-4013-8c2f-fa5fea4cfa03.json",
+    "bodyFileName" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-b80137f6-7734-4f0c-ba03-d71c58fcf51d.json",
     "headers" : {
-      "Content-Type" : "application/json",
-      "Date" : "Wed, 18 Feb 2026 05:10:37 GMT",
-      "X-Amzn-Trace-Id" : "Root=1-699549cb-56ffa5760f7d060739b5c15d;Parent=688ada8c5c631030;Sampled=0;Lineage=1:8be8f50d:0",
-      "x-bt-function-meta-cached" : "HIT",
-      "x-amzn-RequestId" : "af85873a-0ffb-4ee7-818c-b4b13e58948c",
-      "x-bt-function-creds-cached" : "HIT",
       "X-Cache" : "Miss from cloudfront",
-      "Via" : "1.1 da32b45f2cc22dc818960285c4e91b66.cloudfront.net (CloudFront)",
       "X-Amz-Cf-Pop" : "SEA900-P10",
-      "X-Amz-Cf-Id" : "JNDqRpZt2SLn1wEoop1X9EzUDZOq5ZpypyggubWv1v7SnVj0ZeyqVg=="
+      "x-amzn-RequestId" : "99dddf3a-e19a-41cb-a2b8-ec994dc42c55",
+      "X-Amz-Cf-Id" : "MskmpuxVwZTP2zqoNrfCeTS2Ob9MR-1diI_-g-QJthgx9khAUTw3nA==",
+      "x-bt-function-creds-cached" : "HIT",
+      "x-bt-function-meta-cached" : "HIT",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c278-6b4d11fe1836c49a6ea50023;Parent=64b620e14512678b;Sampled=0;Lineage=1:8be8f50d:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:48 GMT",
+      "Via" : "1.1 ffe9646b2ea911744e2d51fc0715cedc.cloudfront.net (CloudFront)",
+      "Content-Type" : "application/json"
     }
   },
-  "uuid" : "b6e869f8-71a5-4013-8c2f-fa5fea4cfa03",
+  "uuid" : "b80137f6-7734-4f0c-ba03-d71c58fcf51d",
   "persistent" : true,
-  "insertionIndex" : 73
+  "insertionIndex" : 22
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-cc7074b5-36dc-4b63-b3b0-50ff9f6e2720.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-cc7074b5-36dc-4b63-b3b0-50ff9f6e2720.json
new file mode 100644
index 00000000..d16fa412
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-cc7074b5-36dc-4b63-b3b0-50ff9f6e2720.json
@@ -0,0 +1,39 @@
+{
+  "id" : "cc7074b5-36dc-4b63-b3b0-50ff9f6e2720",
+  "name" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke",
+  "request" : {
+    "url" : "/v1/function/efa5f9c3-6ece-4726-a9d6-4ba792980b3f/invoke",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"input\":{\"input\":\"apple\",\"output\":\"java-fruit\",\"expected\":\"fruit\",\"metadata\":{}},\"parent\":{\"object_type\":\"playground_logs\",\"object_id\":\"ceea7422-3507-4d1c-a5f7-7acf41d9fac2\",\"row_ids\":{\"id\":\"otel\",\"span_id\":\"81cfa3c1f0da433f\",\"root_span_id\":\"1854d2b68e7d2314ebd19ac7bbda6423\"}}}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-cc7074b5-36dc-4b63-b3b0-50ff9f6e2720.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "X-Amz-Cf-Pop" : "SEA900-P10",
+      "x-bt-function-creds-cached" : "HIT",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c259-0aea69d9427959d478ea7190;Parent=2928fe8948cd67d1;Sampled=0;Lineage=1:8be8f50d:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:17 GMT",
+      "Via" : "1.1 fbb003dfc0617e3e058e3dac791dfd5a.cloudfront.net (CloudFront)",
+      "x-bt-span-export" : "AwMDAc7qdCI1B00cpfd6z0HZ+sIC/zNdFOE3R/SG2sGvY3ZEQwO7YdxwzCVJ+7lRYIgT+SdbeyJwcm9wYWdhdGVkX2V2ZW50Ijp7InNwYW5fYXR0cmlidXRlcyI6eyJwdXJwb3NlIjoic2NvcmVyIn19LCJyb290X3NwYW5faWQiOiIxODU0ZDJiNjhlN2QyMzE0ZWJkMTlhYzdiYmRhNjQyMyJ9",
+      "x-amzn-RequestId" : "f12252fd-a321-44e8-bfa5-93b8c47bc99e",
+      "X-Amz-Cf-Id" : "gRvFNBJzWzu4IxTedkmpzWL_AOhTc6V8yznF1onPDU21k3c1W_Nu2A==",
+      "x-bt-span-id" : "ff335d14-e137-47f4-86da-c1af63764443",
+      "x-bt-function-meta-cached" : "HIT",
+      "Content-Type" : "application/json"
+    }
+  },
+  "uuid" : "cc7074b5-36dc-4b63-b3b0-50ff9f6e2720",
+  "persistent" : true,
+  "insertionIndex" : 96
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-e4059ae2-e33d-4880-ac31-856c18b881a7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-e1901534-8101-43ec-8546-187cfe56c8f2.json
similarity index 56%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-e4059ae2-e33d-4880-ac31-856c18b881a7.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-e1901534-8101-43ec-8546-187cfe56c8f2.json
index e2e21299..328483ac 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-e4059ae2-e33d-4880-ac31-856c18b881a7.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-e1901534-8101-43ec-8546-187cfe56c8f2.json
@@ -1,5 +1,5 @@
 {
-  "id" : "e4059ae2-e33d-4880-ac31-856c18b881a7",
+  "id" : "e1901534-8101-43ec-8546-187cfe56c8f2",
   "name" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke",
   "request" : {
     "url" : "/v1/function/efa5f9c3-6ece-4726-a9d6-4ba792980b3f/invoke",
@@ -17,21 +17,21 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-e4059ae2-e33d-4880-ac31-856c18b881a7.json",
+    "bodyFileName" : "v1_function_efa5f9c3-6ece-4726-a9d6-4ba792980b3f_invoke-e1901534-8101-43ec-8546-187cfe56c8f2.json",
     "headers" : {
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-      "Date" : "Wed, 18 Feb 2026 05:10:47 GMT",
-      "X-Amzn-Trace-Id" : "Root=1-699549d6-692f5599288b8ba97549439c;Parent=5dd03db0ce4bb5f4;Sampled=0;Lineage=1:8be8f50d:0",
-      "x-bt-function-meta-cached" : "MISS",
-      "x-amzn-RequestId" : "ed59a3fd-41af-4cc1-be29-6836de26237d",
-      "x-bt-function-creds-cached" : "HIT",
       "X-Cache" : "Miss from cloudfront",
-      "Via" : "1.1 0df7f27a01014ab815259ca2d88193c6.cloudfront.net (CloudFront)",
       "X-Amz-Cf-Pop" : "SEA900-P10",
-      "X-Amz-Cf-Id" : "vz8869Tx9Oau0l_isoyUsgqlCSPOdEzwKQNSej9zc1PJFppDsEqcXQ=="
+      "x-amzn-RequestId" : "d8ad24c6-540b-4e81-b36a-66d5e9e2791e",
+      "X-Amz-Cf-Id" : "9bhfqu3eUn4XHsA34fP0PE0XYjk9s6L62DgPw_7iDR5WWKgtEsE3dQ==",
+      "x-bt-function-creds-cached" : "HIT",
+      "x-bt-function-meta-cached" : "HIT",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c27f-3b3f01a638c90411281d3d0e;Parent=2c31e01508d45f6d;Sampled=0;Lineage=1:8be8f50d:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:55 GMT",
+      "Via" : "1.1 a624be98cd5b264f373d8ac17f78ee50.cloudfront.net (CloudFront)",
+      "Content-Type" : "application/json"
     }
   },
-  "uuid" : "e4059ae2-e33d-4880-ac31-856c18b881a7",
+  "uuid" : "e1901534-8101-43ec-8546-187cfe56c8f2",
   "persistent" : true,
-  "insertionIndex" : 90
+  "insertionIndex" : 5
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-06dcd7a9-d382-443f-9d9a-de0f796a321f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-06dcd7a9-d382-443f-9d9a-de0f796a321f.json
new file mode 100644
index 00000000..74a9ab6b
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-06dcd7a9-d382-443f-9d9a-de0f796a321f.json
@@ -0,0 +1,46 @@
+{
+  "id" : "06dcd7a9-d382-443f-9d9a-de0f796a321f",
+  "name" : "v1_project",
+  "request" : {
+    "url" : "/v1/project",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"name\":\"java-unit-test\"}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_project-06dcd7a9-d382-443f-9d9a-de0f796a321f.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNPGFmZoAMEHXw=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "352",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c260-1357cffa3dc9113d31b663c5;Parent=45388361dc7017f4;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:24 GMT",
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+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-found-existing" : "true",
+      "x-bt-internal-trace-id" : "69d6c260000000004fe816e91615760f",
+      "x-amzn-RequestId" : "21f2e482-83a5-4f29-be45-0d5722998103",
+      "X-Amz-Cf-Id" : "eCNCMI9pqa7zkn2DJZNi40rojpTjBqiHalFgYZx37ZmYENXBnvx3IA==",
+      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "06dcd7a9-d382-443f-9d9a-de0f796a321f",
+  "persistent" : true,
+  "scenarioName" : "scenario-7-v1-project",
+  "requiredScenarioState" : "scenario-7-v1-project-3",
+  "newScenarioState" : "scenario-7-v1-project-4",
+  "insertionIndex" : 82
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-1cb08041-9f04-4583-8f36-d7a32de3646c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-1cb08041-9f04-4583-8f36-d7a32de3646c.json
new file mode 100644
index 00000000..d5fcd8d1
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-1cb08041-9f04-4583-8f36-d7a32de3646c.json
@@ -0,0 +1,46 @@
+{
+  "id" : "1cb08041-9f04-4583-8f36-d7a32de3646c",
+  "name" : "v1_project",
+  "request" : {
+    "url" : "/v1/project",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"name\":\"java-unit-test\"}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_project-1cb08041-9f04-4583-8f36-d7a32de3646c.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNQpFmpoAMEEMw=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "352",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c26a-3f08b3bd7e079b940b8371e9;Parent=2b449747cd7c455a;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:34 GMT",
+      "Via" : "1.1 b521abc69f4dd055f355de798c5fb95a.cloudfront.net (CloudFront), 1.1 d9d466ed70d93f34739969f91577ec74.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-found-existing" : "true",
+      "x-bt-internal-trace-id" : "69d6c26a00000000598f68bd48e9a66c",
+      "x-amzn-RequestId" : "8c9706ca-732e-4887-a3ed-9d96a08e2fa3",
+      "X-Amz-Cf-Id" : "haZHtb6lHrPYzrb_irVKJQK89ByG7rnnOE42bNrTHoDhqm0-K5Wsbg==",
+      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "1cb08041-9f04-4583-8f36-d7a32de3646c",
+  "persistent" : true,
+  "scenarioName" : "scenario-7-v1-project",
+  "requiredScenarioState" : "scenario-7-v1-project-8",
+  "newScenarioState" : "scenario-7-v1-project-9",
+  "insertionIndex" : 59
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-1fa7dd05-7caf-4cc6-a5d3-8d1685af3219.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-1fa7dd05-7caf-4cc6-a5d3-8d1685af3219.json
deleted file mode 100644
index c0c2cc50..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-1fa7dd05-7caf-4cc6-a5d3-8d1685af3219.json
+++ /dev/null
@@ -1,46 +0,0 @@
-{
-  "id" : "1fa7dd05-7caf-4cc6-a5d3-8d1685af3219",
-  "name" : "v1_project",
-  "request" : {
-    "url" : "/v1/project",
-    "method" : "POST",
-    "headers" : {
-      "Content-Type" : {
-        "equalTo" : "application/json"
-      }
-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"name\":\"java-unit-test\"}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
-    } ]
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_project-1fa7dd05-7caf-4cc6-a5d3-8d1685af3219.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:12 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "553084a9-ac81-4047-9ab4-7c10ed0d7660",
-      "x-amzn-Remapped-content-length" : "352",
-      "x-bt-internal-trace-id" : "699549b4000000004470e1b25a54e7d7",
-      "x-amz-apigw-id" : "Y9h0NHN9IAMEPxg=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
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-      "x-bt-found-existing" : "true",
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-  "uuid" : "1fa7dd05-7caf-4cc6-a5d3-8d1685af3219",
-  "persistent" : true,
-  "scenarioName" : "scenario-1-v1-project",
-  "requiredScenarioState" : "scenario-1-v1-project-3",
-  "newScenarioState" : "scenario-1-v1-project-4",
-  "insertionIndex" : 18
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-2d59730a-1d24-4f8e-bf62-9da9e50efbfc.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-2d59730a-1d24-4f8e-bf62-9da9e50efbfc.json
new file mode 100644
index 00000000..57efadd2
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-2d59730a-1d24-4f8e-bf62-9da9e50efbfc.json
@@ -0,0 +1,46 @@
+{
+  "id" : "2d59730a-1d24-4f8e-bf62-9da9e50efbfc",
+  "name" : "v1_project",
+  "request" : {
+    "url" : "/v1/project",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"name\":\"java-unit-test\"}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_project-2d59730a-1d24-4f8e-bf62-9da9e50efbfc.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNRjGPcIAMEqOw=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "352",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c26f-325e06ce5cc8b86d0824ef4a;Parent=18c0e42d8957711e;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:39 GMT",
+      "Via" : "1.1 d08613e1dd8ad614e47875ae31a8af20.cloudfront.net (CloudFront), 1.1 82fa7f20ab5a12301da8e01f9493e222.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-found-existing" : "true",
+      "x-bt-internal-trace-id" : "69d6c26f000000006c408ad36a3f1cd7",
+      "x-amzn-RequestId" : "6809eff1-fea1-43b7-ae2d-ae995f84e72d",
+      "X-Amz-Cf-Id" : "1-7jOx-e-CkG2YWQ1lXNJznX5d0euPingDTdQyiHzayz6Dgk-nM0xA==",
+      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "2d59730a-1d24-4f8e-bf62-9da9e50efbfc",
+  "persistent" : true,
+  "scenarioName" : "scenario-7-v1-project",
+  "requiredScenarioState" : "scenario-7-v1-project-11",
+  "newScenarioState" : "scenario-7-v1-project-12",
+  "insertionIndex" : 44
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-f89561c8-98a5-4db4-9ce0-bde1b8836c09.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-4b954b44-2701-4009-998a-454ad365d9c2.json
similarity index 51%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-f89561c8-98a5-4db4-9ce0-bde1b8836c09.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-4b954b44-2701-4009-998a-454ad365d9c2.json
index 266e548d..e304850c 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-f89561c8-98a5-4db4-9ce0-bde1b8836c09.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-4b954b44-2701-4009-998a-454ad365d9c2.json
@@ -1,5 +1,5 @@
 {
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@@ -17,30 +17,30 @@
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-  "requiredScenarioState" : "scenario-1-v1-project-11",
-  "newScenarioState" : "scenario-1-v1-project-12",
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 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-f5dd653c-69fc-4a55-9f1e-4be4d49afbc5.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-61f2245d-e3c4-4dde-8672-7ad888f99808.json
similarity index 51%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-f5dd653c-69fc-4a55-9f1e-4be4d49afbc5.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-61f2245d-e3c4-4dde-8672-7ad888f99808.json
index 129cac61..aa3e99ab 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-f5dd653c-69fc-4a55-9f1e-4be4d49afbc5.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-61f2245d-e3c4-4dde-8672-7ad888f99808.json
@@ -1,5 +1,5 @@
 {
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+  "id" : "61f2245d-e3c4-4dde-8672-7ad888f99808",
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@@ -17,30 +17,30 @@
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-    "bodyFileName" : "v1_project-f5dd653c-69fc-4a55-9f1e-4be4d49afbc5.json",
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-  "requiredScenarioState" : "scenario-1-v1-project-5",
-  "newScenarioState" : "scenario-1-v1-project-6",
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d54fe68d-3d37-45d1-ba3b-f918ff580c96.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-6ee4243b-92d7-4eaf-913e-37e93dae3a6c.json
similarity index 50%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d54fe68d-3d37-45d1-ba3b-f918ff580c96.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-6ee4243b-92d7-4eaf-913e-37e93dae3a6c.json
index f1c818e0..58ac53b4 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d54fe68d-3d37-45d1-ba3b-f918ff580c96.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-6ee4243b-92d7-4eaf-913e-37e93dae3a6c.json
@@ -1,5 +1,5 @@
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@@ -17,30 +17,30 @@
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-7c906468-8c3b-41d9-9d64-bad50af2d83f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-7c906468-8c3b-41d9-9d64-bad50af2d83f.json
deleted file mode 100644
index 128a7586..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-7c906468-8c3b-41d9-9d64-bad50af2d83f.json
+++ /dev/null
@@ -1,46 +0,0 @@
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-f4112c4b-1e56-465a-a266-4e8eaaac6910.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-7ee56a38-e0a4-43ad-9d5f-0a3ad5642649.json
similarity index 51%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-f4112c4b-1e56-465a-a266-4e8eaaac6910.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-7ee56a38-e0a4-43ad-9d5f-0a3ad5642649.json
index 6d542fc9..5c513991 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-f4112c4b-1e56-465a-a266-4e8eaaac6910.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-7ee56a38-e0a4-43ad-9d5f-0a3ad5642649.json
@@ -1,5 +1,5 @@
 {
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+      "x-bt-internal-trace-id" : "69d6c271000000000381622996a7bb6e",
+      "x-amzn-RequestId" : "cec8719c-95e1-4065-98d5-d05b37786ae5",
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+      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
+      "Content-Type" : "application/json; charset=utf-8"
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-  "uuid" : "f4112c4b-1e56-465a-a266-4e8eaaac6910",
+  "uuid" : "7ee56a38-e0a4-43ad-9d5f-0a3ad5642649",
   "persistent" : true,
-  "scenarioName" : "scenario-1-v1-project",
-  "requiredScenarioState" : "scenario-1-v1-project-2",
-  "newScenarioState" : "scenario-1-v1-project-3",
-  "insertionIndex" : 14
+  "scenarioName" : "scenario-7-v1-project",
+  "requiredScenarioState" : "scenario-7-v1-project-12",
+  "newScenarioState" : "scenario-7-v1-project-13",
+  "insertionIndex" : 40
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-8f66d51b-d93c-4a00-8442-2180c182bdd9.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-8f66d51b-d93c-4a00-8442-2180c182bdd9.json
new file mode 100644
index 00000000..1cf54f0b
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-8f66d51b-d93c-4a00-8442-2180c182bdd9.json
@@ -0,0 +1,45 @@
+{
+  "id" : "8f66d51b-d93c-4a00-8442-2180c182bdd9",
+  "name" : "v1_project",
+  "request" : {
+    "url" : "/v1/project",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"name\":\"java-unit-test\"}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_project-8f66d51b-d93c-4a00-8442-2180c182bdd9.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNSBHxyIAMEuFQ=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "352",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c272-697e8da267193ae04dc1d4b2;Parent=1f8c741d7e6ca8d0;Sampled=0;Lineage=1:24be3d11:0",
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+      "access-control-allow-credentials" : "true",
+      "x-bt-found-existing" : "true",
+      "x-bt-internal-trace-id" : "69d6c273000000001957031dc43521c7",
+      "x-amzn-RequestId" : "7aeed307-ade6-4a6c-a390-737f6669d8ef",
+      "X-Amz-Cf-Id" : "L1dq0DaBtWoKeqifnzkLR4AV9wp4dL5zD0wpIVuCHFaPi3nEvKNXgQ==",
+      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "8f66d51b-d93c-4a00-8442-2180c182bdd9",
+  "persistent" : true,
+  "scenarioName" : "scenario-7-v1-project",
+  "requiredScenarioState" : "scenario-7-v1-project-13",
+  "insertionIndex" : 36
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-a08f63db-622a-43fc-98a4-ddcd7746db6b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-a08f63db-622a-43fc-98a4-ddcd7746db6b.json
deleted file mode 100644
index f26ad672..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-a08f63db-622a-43fc-98a4-ddcd7746db6b.json
+++ /dev/null
@@ -1,46 +0,0 @@
-{
-  "id" : "a08f63db-622a-43fc-98a4-ddcd7746db6b",
-  "name" : "v1_project",
-  "request" : {
-    "url" : "/v1/project",
-    "method" : "POST",
-    "headers" : {
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-    },
-    "bodyPatterns" : [ {
-      "equalToJson" : "{\"name\":\"java-unit-test\"}",
-      "ignoreArrayOrder" : true,
-      "ignoreExtraElements" : false
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-  },
-  "response" : {
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-    "bodyFileName" : "v1_project-a08f63db-622a-43fc-98a4-ddcd7746db6b.json",
-    "headers" : {
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-  "scenarioName" : "scenario-1-v1-project",
-  "requiredScenarioState" : "scenario-1-v1-project-8",
-  "newScenarioState" : "scenario-1-v1-project-9",
-  "insertionIndex" : 40
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-a3f338e8-9110-4162-8ffb-f29554bcefa7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-a3f338e8-9110-4162-8ffb-f29554bcefa7.json
new file mode 100644
index 00000000..0766d386
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-a3f338e8-9110-4162-8ffb-f29554bcefa7.json
@@ -0,0 +1,46 @@
+{
+  "id" : "a3f338e8-9110-4162-8ffb-f29554bcefa7",
+  "name" : "v1_project",
+  "request" : {
+    "url" : "/v1/project",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"name\":\"java-unit-test\"}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_project-a3f338e8-9110-4162-8ffb-f29554bcefa7.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNO1GGVIAMEYoA=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "352",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c25e-7ad4f36536a558f82f12433b;Parent=425fce77ce7f4abd;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:22 GMT",
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+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-found-existing" : "true",
+      "x-bt-internal-trace-id" : "69d6c25e000000006af8b446146ae9cc",
+      "x-amzn-RequestId" : "1e0e5f3b-3b41-478c-8404-5bf52bce04a2",
+      "X-Amz-Cf-Id" : "icwHCG8T1RkBHC1lihbZRjizCsfjrDB_qzWfkdP77FJyKqHyrlj-ww==",
+      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "a3f338e8-9110-4162-8ffb-f29554bcefa7",
+  "persistent" : true,
+  "scenarioName" : "scenario-7-v1-project",
+  "requiredScenarioState" : "scenario-7-v1-project-2",
+  "newScenarioState" : "scenario-7-v1-project-3",
+  "insertionIndex" : 86
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-7f90e12f-62a9-47f9-a2fc-764c6af662d2.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-c5e528a5-f930-4324-b13c-d0d5b328e859.json
similarity index 51%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-7f90e12f-62a9-47f9-a2fc-764c6af662d2.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-c5e528a5-f930-4324-b13c-d0d5b328e859.json
index e8bfb35d..a3789fd4 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-7f90e12f-62a9-47f9-a2fc-764c6af662d2.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-c5e528a5-f930-4324-b13c-d0d5b328e859.json
@@ -1,5 +1,5 @@
 {
-  "id" : "7f90e12f-62a9-47f9-a2fc-764c6af662d2",
+  "id" : "c5e528a5-f930-4324-b13c-d0d5b328e859",
   "name" : "v1_project",
   "request" : {
     "url" : "/v1/project",
@@ -17,30 +17,30 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_project-7f90e12f-62a9-47f9-a2fc-764c6af662d2.json",
+    "bodyFileName" : "v1_project-c5e528a5-f930-4324-b13c-d0d5b328e859.json",
     "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNQ0FQPIAMENiQ=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "352",
       "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:18 GMT",
+      "X-Amzn-Trace-Id" : "Root=1-69d6c26b-18711d806b64ce6572bef096;Parent=50eaf04a5526af86;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:35 GMT",
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-      "x-amzn-Remapped-content-length" : "352",
-      "x-bt-internal-trace-id" : "699549ba0000000051d5116927cdbbe7",
-      "x-amz-apigw-id" : "Y9h1MF73oAMEYhg=",
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-      "X-Amz-Cf-Id" : "B9XUQ7v8qtel69hlUVw7rhW6JTeO5MbTFM34jKso-Q0fD0ZPA1GIAw=="
+      "x-bt-internal-trace-id" : "69d6c26b000000003a7b329c4fd015cf",
+      "x-amzn-RequestId" : "0d2d0191-bf3a-4a53-b984-729a547b279d",
+      "X-Amz-Cf-Id" : "CpwQVhIowr-JmW6BG0RYfY838IRsO0N8INF0M5Weij7rs-nudoV7QQ==",
+      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
+      "Content-Type" : "application/json; charset=utf-8"
     }
   },
-  "uuid" : "7f90e12f-62a9-47f9-a2fc-764c6af662d2",
+  "uuid" : "c5e528a5-f930-4324-b13c-d0d5b328e859",
   "persistent" : true,
-  "scenarioName" : "scenario-1-v1-project",
-  "requiredScenarioState" : "scenario-1-v1-project-6",
-  "newScenarioState" : "scenario-1-v1-project-7",
-  "insertionIndex" : 33
+  "scenarioName" : "scenario-7-v1-project",
+  "requiredScenarioState" : "scenario-7-v1-project-9",
+  "newScenarioState" : "scenario-7-v1-project-10",
+  "insertionIndex" : 56
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-3f8abac9-58c7-4f76-8575-ca85fed96a95.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d42d6e0f-be40-4051-bc80-2f5bf8daa556.json
similarity index 51%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-3f8abac9-58c7-4f76-8575-ca85fed96a95.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d42d6e0f-be40-4051-bc80-2f5bf8daa556.json
index 0448ffd0..fadf76d6 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-3f8abac9-58c7-4f76-8575-ca85fed96a95.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d42d6e0f-be40-4051-bc80-2f5bf8daa556.json
@@ -1,5 +1,5 @@
 {
-  "id" : "3f8abac9-58c7-4f76-8575-ca85fed96a95",
+  "id" : "d42d6e0f-be40-4051-bc80-2f5bf8daa556",
   "name" : "v1_project",
   "request" : {
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@@ -17,30 +17,30 @@
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   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_project-3f8abac9-58c7-4f76-8575-ca85fed96a95.json",
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     "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
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-  "uuid" : "3f8abac9-58c7-4f76-8575-ca85fed96a95",
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   "persistent" : true,
-  "scenarioName" : "scenario-1-v1-project",
-  "requiredScenarioState" : "scenario-1-v1-project-9",
-  "newScenarioState" : "scenario-1-v1-project-10",
-  "insertionIndex" : 45
+  "scenarioName" : "scenario-7-v1-project",
+  "requiredScenarioState" : "scenario-7-v1-project-10",
+  "newScenarioState" : "scenario-7-v1-project-11",
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 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-06c4d503-387e-436e-a764-4b136115e5d4.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d85c7d0c-c938-4e00-adf7-ffd4b168cd41.json
similarity index 51%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-06c4d503-387e-436e-a764-4b136115e5d4.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d85c7d0c-c938-4e00-adf7-ffd4b168cd41.json
index a50e21ce..d23007dc 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-06c4d503-387e-436e-a764-4b136115e5d4.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d85c7d0c-c938-4e00-adf7-ffd4b168cd41.json
@@ -1,5 +1,5 @@
 {
-  "id" : "06c4d503-387e-436e-a764-4b136115e5d4",
+  "id" : "d85c7d0c-c938-4e00-adf7-ffd4b168cd41",
   "name" : "v1_project",
   "request" : {
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@@ -17,30 +17,30 @@
   },
   "response" : {
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-    "bodyFileName" : "v1_project-06c4d503-387e-436e-a764-4b136115e5d4.json",
+    "bodyFileName" : "v1_project-d85c7d0c-c938-4e00-adf7-ffd4b168cd41.json",
     "headers" : {
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-  "uuid" : "06c4d503-387e-436e-a764-4b136115e5d4",
+  "uuid" : "d85c7d0c-c938-4e00-adf7-ffd4b168cd41",
   "persistent" : true,
-  "scenarioName" : "scenario-1-v1-project",
-  "requiredScenarioState" : "scenario-1-v1-project-7",
-  "newScenarioState" : "scenario-1-v1-project-8",
-  "insertionIndex" : 37
+  "scenarioName" : "scenario-7-v1-project",
+  "requiredScenarioState" : "scenario-7-v1-project-4",
+  "newScenarioState" : "scenario-7-v1-project-5",
+  "insertionIndex" : 79
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-9b528947-9e0e-44b7-8841-79d10d8c5678.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d9cb4f28-2b10-4e12-b9d4-14033e1fb0ad.json
similarity index 51%
rename from test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-9b528947-9e0e-44b7-8841-79d10d8c5678.json
rename to test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d9cb4f28-2b10-4e12-b9d4-14033e1fb0ad.json
index 1b55124d..a7d03e6c 100644
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-9b528947-9e0e-44b7-8841-79d10d8c5678.json
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-d9cb4f28-2b10-4e12-b9d4-14033e1fb0ad.json
@@ -1,5 +1,5 @@
 {
-  "id" : "9b528947-9e0e-44b7-8841-79d10d8c5678",
+  "id" : "d9cb4f28-2b10-4e12-b9d4-14033e1fb0ad",
   "name" : "v1_project",
   "request" : {
     "url" : "/v1/project",
@@ -17,30 +17,30 @@
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   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1_project-9b528947-9e0e-44b7-8841-79d10d8c5678.json",
+    "bodyFileName" : "v1_project-d9cb4f28-2b10-4e12-b9d4-14033e1fb0ad.json",
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+      "X-Cache" : "Miss from cloudfront",
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-  "uuid" : "9b528947-9e0e-44b7-8841-79d10d8c5678",
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   "persistent" : true,
-  "scenarioName" : "scenario-1-v1-project",
-  "requiredScenarioState" : "scenario-1-v1-project-4",
-  "newScenarioState" : "scenario-1-v1-project-5",
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+  "scenarioName" : "scenario-7-v1-project",
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+  "newScenarioState" : "scenario-7-v1-project-8",
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 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-ffe77477-1d1a-49a0-8880-60c5ae03b062.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-ffe77477-1d1a-49a0-8880-60c5ae03b062.json
deleted file mode 100644
index 57002100..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project-ffe77477-1d1a-49a0-8880-60c5ae03b062.json
+++ /dev/null
@@ -1,45 +0,0 @@
-{
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-1ee75bee-9420-4ee5-9c5e-580a6d818e98.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-1ee75bee-9420-4ee5-9c5e-580a6d818e98.json
deleted file mode 100644
index d76604b7..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-1ee75bee-9420-4ee5-9c5e-580a6d818e98.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-24098252-be3a-443a-ab3d-ca6f7ceb75e2.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-24098252-be3a-443a-ab3d-ca6f7ceb75e2.json
new file mode 100644
index 00000000..3a6bc9be
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-24098252-be3a-443a-ab3d-ca6f7ceb75e2.json
@@ -0,0 +1,35 @@
+{
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+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-2ae2e949-7c1f-45c7-b9fb-3fc307fb853f.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-2ae2e949-7c1f-45c7-b9fb-3fc307fb853f.json
new file mode 100644
index 00000000..cff6290a
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@@ -0,0 +1,35 @@
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+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
+  "request" : {
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+}
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deleted file mode 100644
index f7e6bba2..00000000
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3b58de8a-13c5-4f53-b651-ffd567ed77ea.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3b58de8a-13c5-4f53-b651-ffd567ed77ea.json
new file mode 100644
index 00000000..e5b836f0
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3b58de8a-13c5-4f53-b651-ffd567ed77ea.json
@@ -0,0 +1,35 @@
+{
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+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
+  "request" : {
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+    "method" : "GET"
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+      "vary" : "Origin, Accept-Encoding",
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+    }
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+  "persistent" : true,
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3bce61de-6910-4e9d-875b-bf7a462f3c22.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3bce61de-6910-4e9d-875b-bf7a462f3c22.json
new file mode 100644
index 00000000..3d812490
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3bce61de-6910-4e9d-875b-bf7a462f3c22.json
@@ -0,0 +1,35 @@
+{
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+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
+  "request" : {
+    "url" : "/v1/project/6ae68365-7620-4630-921b-bac416634fc8",
+    "method" : "GET"
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+  "response" : {
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+    "bodyFileName" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8-3bce61de-6910-4e9d-875b-bf7a462f3c22.json",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3d04552e-5b29-4e88-9b0e-a33dd91ac83b.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3d04552e-5b29-4e88-9b0e-a33dd91ac83b.json
deleted file mode 100644
index 610c11f5..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3d04552e-5b29-4e88-9b0e-a33dd91ac83b.json
+++ /dev/null
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-{
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3f2ce48f-0367-4ac1-864b-12d9385616e2.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3f2ce48f-0367-4ac1-864b-12d9385616e2.json
new file mode 100644
index 00000000..2af0fa2c
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3f2ce48f-0367-4ac1-864b-12d9385616e2.json
@@ -0,0 +1,35 @@
+{
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+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
+  "request" : {
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+    "headers" : {
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+      "x-amz-apigw-id" : "bhNToFAaIAMEOtQ=",
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+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c27d0000000036a0ed891d2ca67d",
+      "x-amzn-RequestId" : "157aeaab-874f-4d9b-a04d-98a7ea572e03",
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+  },
+  "uuid" : "3f2ce48f-0367-4ac1-864b-12d9385616e2",
+  "persistent" : true,
+  "scenarioName" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8",
+  "requiredScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-17",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3f4454a1-c3fe-4f7c-b89d-3697e40b9591.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3f4454a1-c3fe-4f7c-b89d-3697e40b9591.json
deleted file mode 100644
index ae06ce96..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-3f4454a1-c3fe-4f7c-b89d-3697e40b9591.json
+++ /dev/null
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-81a5b6bc-7ab5-45d0-9ddc-1a367998bf07.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-81a5b6bc-7ab5-45d0-9ddc-1a367998bf07.json
new file mode 100644
index 00000000..81abf7a0
--- /dev/null
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@@ -0,0 +1,35 @@
+{
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+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
+  "request" : {
+    "url" : "/v1/project/6ae68365-7620-4630-921b-bac416634fc8",
+    "method" : "GET"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8-81a5b6bc-7ab5-45d0-9ddc-1a367998bf07.json",
+    "headers" : {
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+    }
+  },
+  "uuid" : "81a5b6bc-7ab5-45d0-9ddc-1a367998bf07",
+  "persistent" : true,
+  "scenarioName" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8",
+  "requiredScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-2",
+  "newScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-3",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-879c18ac-aae4-4807-975a-744bc9c9a301.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-879c18ac-aae4-4807-975a-744bc9c9a301.json
new file mode 100644
index 00000000..54b18872
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-879c18ac-aae4-4807-975a-744bc9c9a301.json
@@ -0,0 +1,35 @@
+{
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+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
+  "request" : {
+    "url" : "/v1/project/6ae68365-7620-4630-921b-bac416634fc8",
+    "method" : "GET"
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+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8-879c18ac-aae4-4807-975a-744bc9c9a301.json",
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+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "879c18ac-aae4-4807-975a-744bc9c9a301",
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+  "scenarioName" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8",
+  "requiredScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-9",
+  "newScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-10",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-88566aef-1a8c-4929-bffc-edcf08b3a98a.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-88566aef-1a8c-4929-bffc-edcf08b3a98a.json
new file mode 100644
index 00000000..4a6710aa
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-88566aef-1a8c-4929-bffc-edcf08b3a98a.json
@@ -0,0 +1,35 @@
+{
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+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
+  "request" : {
+    "url" : "/v1/project/6ae68365-7620-4630-921b-bac416634fc8",
+    "method" : "GET"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8-88566aef-1a8c-4929-bffc-edcf08b3a98a.json",
+    "headers" : {
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+      "x-amz-apigw-id" : "bhNOlEUeIAMEUOQ=",
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+      "x-bt-internal-trace-id" : "69d6c25d00000000773fd4d78af79eb7",
+      "x-amzn-RequestId" : "40df8931-1ed1-4a38-afd4-18fc79811f7d",
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+  },
+  "uuid" : "88566aef-1a8c-4929-bffc-edcf08b3a98a",
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+  "requiredScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-5",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-8b1ae737-c598-49cd-85fb-a797fb8451d1.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-8b1ae737-c598-49cd-85fb-a797fb8451d1.json
deleted file mode 100644
index 553640b1..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-8b1ae737-c598-49cd-85fb-a797fb8451d1.json
+++ /dev/null
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-{
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-9969f5b2-54fe-4b5c-a9e1-850c38683536.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-9969f5b2-54fe-4b5c-a9e1-850c38683536.json
new file mode 100644
index 00000000..ac788190
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-9969f5b2-54fe-4b5c-a9e1-850c38683536.json
@@ -0,0 +1,35 @@
+{
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+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
+  "request" : {
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+    "method" : "GET"
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+  "response" : {
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+    "bodyFileName" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8-9969f5b2-54fe-4b5c-a9e1-850c38683536.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNRMHG8oAMEiPg=",
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+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-9a669d3c-0479-46d5-bca6-e41452e3d127.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-9a669d3c-0479-46d5-bca6-e41452e3d127.json
deleted file mode 100644
index 4ffea095..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-9a669d3c-0479-46d5-bca6-e41452e3d127.json
+++ /dev/null
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-ad0d7384-6790-48b0-8f79-73db2f2569ec.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-ad0d7384-6790-48b0-8f79-73db2f2569ec.json
deleted file mode 100644
index b06e5be0..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-ad0d7384-6790-48b0-8f79-73db2f2569ec.json
+++ /dev/null
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deleted file mode 100644
index cdfcd0c9..00000000
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-b8cd12a7-3105-4324-b940-1b06f1dc1f45.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-b8cd12a7-3105-4324-b940-1b06f1dc1f45.json
deleted file mode 100644
index 7e8d3ed0..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-b8cd12a7-3105-4324-b940-1b06f1dc1f45.json
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-b98444d3-e3e8-4ff0-a9fe-1498c90cdc27.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-b98444d3-e3e8-4ff0-a9fe-1498c90cdc27.json
deleted file mode 100644
index 446723bf..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-b98444d3-e3e8-4ff0-a9fe-1498c90cdc27.json
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diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-badf1ce3-a4b1-4947-94e7-1dffbc71686c.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-badf1ce3-a4b1-4947-94e7-1dffbc71686c.json
new file mode 100644
index 00000000..3b650dc2
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\ No newline at end of file
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deleted file mode 100644
index 4f323e36..00000000
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new file mode 100644
index 00000000..b09061df
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+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c26b000000004a5edff49f6833e8",
+      "x-amzn-RequestId" : "11e21ff2-407d-4b1c-8647-3a5088c1e7a8",
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+      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "c877c616-045a-4b80-8e96-5b03e23dcd8c",
+  "persistent" : true,
+  "scenarioName" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8",
+  "requiredScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-10",
+  "newScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-11",
+  "insertionIndex" : 55
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-d7c9ae7e-a2b3-4178-9e92-380e2e190701.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-d7c9ae7e-a2b3-4178-9e92-380e2e190701.json
deleted file mode 100644
index c18fedd4..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-d7c9ae7e-a2b3-4178-9e92-380e2e190701.json
+++ /dev/null
@@ -1,35 +0,0 @@
-{
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-  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
-  "request" : {
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-    "method" : "GET"
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-  "response" : {
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-    "bodyFileName" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8-d7c9ae7e-a2b3-4178-9e92-380e2e190701.json",
-    "headers" : {
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-      "Date" : "Wed, 18 Feb 2026 05:10:21 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "aa74b6ed-b05e-4b8f-a816-a2fa48694488",
-      "x-amzn-Remapped-content-length" : "352",
-      "x-bt-internal-trace-id" : "699549bd00000000054df7b84fd25556",
-      "x-amz-apigw-id" : "Y9h1sGRvIAMEVdg=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549bd-0af39872144a5046242a2ef1;Parent=75c267c380010c6a;Sampled=0;Lineage=1:24be3d11:0",
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-      "X-Amz-Cf-Id" : "pUff9owm9wVsV5d16b8_L7eRxz0NRcZk55NpztZ_ElwGNyfqUypl3w=="
-    }
-  },
-  "uuid" : "d7c9ae7e-a2b3-4178-9e92-380e2e190701",
-  "persistent" : true,
-  "scenarioName" : "scenario-4-v1-project-6ae68365-7620-4630-921b-bac416634fc8",
-  "requiredScenarioState" : "scenario-4-v1-project-6ae68365-7620-4630-921b-bac416634fc8-6",
-  "newScenarioState" : "scenario-4-v1-project-6ae68365-7620-4630-921b-bac416634fc8-7",
-  "insertionIndex" : 41
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-e1b0baf4-e618-42ec-bb1d-7b08f001fbb7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-e1b0baf4-e618-42ec-bb1d-7b08f001fbb7.json
deleted file mode 100644
index b1cc5de5..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-e1b0baf4-e618-42ec-bb1d-7b08f001fbb7.json
+++ /dev/null
@@ -1,34 +0,0 @@
-{
-  "id" : "e1b0baf4-e618-42ec-bb1d-7b08f001fbb7",
-  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
-  "request" : {
-    "url" : "/v1/project/6ae68365-7620-4630-921b-bac416634fc8",
-    "method" : "GET"
-  },
-  "response" : {
-    "status" : 200,
-    "bodyFileName" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8-e1b0baf4-e618-42ec-bb1d-7b08f001fbb7.json",
-    "headers" : {
-      "Content-Type" : "application/json; charset=utf-8",
-      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:45 GMT",
-      "access-control-allow-credentials" : "true",
-      "x-amzn-RequestId" : "a5b021c8-2abd-4850-ba15-6719d4463a25",
-      "x-amzn-Remapped-content-length" : "352",
-      "x-bt-internal-trace-id" : "699549d5000000000c93001ca6ba09c1",
-      "x-amz-apigw-id" : "Y9h5bEvhIAMEE1w=",
-      "vary" : "Origin, Accept-Encoding",
-      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
-      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms",
-      "X-Amzn-Trace-Id" : "Root=1-699549d5-0e5819244f64e686795acf04;Parent=1c2e2375c7198d07;Sampled=0;Lineage=1:24be3d11:0",
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-      "X-Cache" : "Miss from cloudfront",
-      "X-Amz-Cf-Id" : "s2H-bGMnz4E6fU5hEom6gAbm8a3mzqyAD5zq0Nz0cvhSM5KUB_3omQ=="
-    }
-  },
-  "uuid" : "e1b0baf4-e618-42ec-bb1d-7b08f001fbb7",
-  "persistent" : true,
-  "scenarioName" : "scenario-4-v1-project-6ae68365-7620-4630-921b-bac416634fc8",
-  "requiredScenarioState" : "scenario-4-v1-project-6ae68365-7620-4630-921b-bac416634fc8-14",
-  "insertionIndex" : 88
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-ee912781-620b-4249-915d-f585dbdb3cd7.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-ee912781-620b-4249-915d-f585dbdb3cd7.json
new file mode 100644
index 00000000..dc4d2f98
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-ee912781-620b-4249-915d-f585dbdb3cd7.json
@@ -0,0 +1,35 @@
+{
+  "id" : "ee912781-620b-4249-915d-f585dbdb3cd7",
+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
+  "request" : {
+    "url" : "/v1/project/6ae68365-7620-4630-921b-bac416634fc8",
+    "method" : "GET"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8-ee912781-620b-4249-915d-f585dbdb3cd7.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNSFFS2oAMEYTA=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "352",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c273-6429c692759f7cca194e38b2;Parent=12d6b770b5741399;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:43 GMT",
+      "Via" : "1.1 b521abc69f4dd055f355de798c5fb95a.cloudfront.net (CloudFront), 1.1 73b0c4a85645a8031ba157e0b3e28ffc.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c2730000000013aed053da570df3",
+      "x-amzn-RequestId" : "07ff433f-66b0-4f03-abb6-7396e1949578",
+      "X-Amz-Cf-Id" : "RiwyAKA5Zoh2wewU1AZElQ37gdOK22OfZchSxGsPldFIC0bibHWA4g==",
+      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "ee912781-620b-4249-915d-f585dbdb3cd7",
+  "persistent" : true,
+  "scenarioName" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8",
+  "requiredScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-13",
+  "newScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-14",
+  "insertionIndex" : 35
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-fb217604-cc13-4af6-a046-cf0fea4577e1.json b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-fb217604-cc13-4af6-a046-cf0fea4577e1.json
new file mode 100644
index 00000000..2e7adb5e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/braintrust/mappings/v1_project_6ae68365-7620-4630-921b-bac416634fc8-fb217604-cc13-4af6-a046-cf0fea4577e1.json
@@ -0,0 +1,35 @@
+{
+  "id" : "fb217604-cc13-4af6-a046-cf0fea4577e1",
+  "name" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8",
+  "request" : {
+    "url" : "/v1/project/6ae68365-7620-4630-921b-bac416634fc8",
+    "method" : "GET"
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1_project_6ae68365-7620-4630-921b-bac416634fc8-fb217604-cc13-4af6-a046-cf0fea4577e1.json",
+    "headers" : {
+      "X-Cache" : "Miss from cloudfront",
+      "x-amz-apigw-id" : "bhNO5EFWIAMETXw=",
+      "vary" : "Origin, Accept-Encoding",
+      "x-amzn-Remapped-content-length" : "352",
+      "X-Amz-Cf-Pop" : [ "SEA900-P1", "SEA900-P10" ],
+      "X-Amzn-Trace-Id" : "Root=1-69d6c25e-4f62262d17a75fac2d7cbc2c;Parent=63ae994fd9f30a2c;Sampled=0;Lineage=1:24be3d11:0",
+      "Date" : "Wed, 08 Apr 2026 21:02:23 GMT",
+      "Via" : "1.1 95a087e13956fc03ffaeeaec4faa051a.cloudfront.net (CloudFront), 1.1 e6b2537b87653726af8a79e6da505188.cloudfront.net (CloudFront)",
+      "access-control-expose-headers" : "x-bt-cursor,x-bt-found-existing,x-bt-query-plan,x-bt-api-duration-ms,x-bt-brainstore-duration-ms,x-bt-internal-trace-id",
+      "access-control-allow-credentials" : "true",
+      "x-bt-internal-trace-id" : "69d6c25f000000004ef60d6f0f7c367a",
+      "x-amzn-RequestId" : "665b9adc-8511-4325-8fa5-a7e1601447dc",
+      "X-Amz-Cf-Id" : "bKRyjeV4LxflWQB4EyispRBxPBClwC0LGTy_YghDWi4ugrcgnaDjtA==",
+      "etag" : "W/\"160-RUdtZR434qrXxI13debDoTK1a2s\"",
+      "Content-Type" : "application/json; charset=utf-8"
+    }
+  },
+  "uuid" : "fb217604-cc13-4af6-a046-cf0fea4577e1",
+  "persistent" : true,
+  "scenarioName" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8",
+  "requiredScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-6",
+  "newScenarioState" : "scenario-2-v1-project-6ae68365-7620-4630-921b-bac416634fc8-7",
+  "insertionIndex" : 85
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-20-flash-litegeneratecontent-a3ac84ad-7e12-4fac-9732-3622e4959c01.json b/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.0-flash-litegeneratecontent-9c58a8f9-e6f9-4f5a-921e-cd67c5f91820.json
similarity index 93%
rename from test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-20-flash-litegeneratecontent-a3ac84ad-7e12-4fac-9732-3622e4959c01.json
rename to test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.0-flash-litegeneratecontent-9c58a8f9-e6f9-4f5a-921e-cd67c5f91820.json
index 802acea9..5658ccd2 100644
--- a/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-20-flash-litegeneratecontent-a3ac84ad-7e12-4fac-9732-3622e4959c01.json
+++ b/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.0-flash-litegeneratecontent-9c58a8f9-e6f9-4f5a-921e-cd67c5f91820.json
@@ -31,5 +31,5 @@
     ]
   },
   "modelVersion": "gemini-2.0-flash-lite",
-  "responseId": "3UmVadfNC4mjqtsPvojguAQ"
+  "responseId": "PMPWacWeOqr4qtsPyLLa4QQ"
 }
diff --git a/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-20-flash-litegeneratecontent-1c3e0394-1e3e-48e2-bd68-e030c1edc508.json b/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.0-flash-litegeneratecontent-c270a989-b89b-4e99-950f-7981f359e598.json
similarity index 87%
rename from test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-20-flash-litegeneratecontent-1c3e0394-1e3e-48e2-bd68-e030c1edc508.json
rename to test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.0-flash-litegeneratecontent-c270a989-b89b-4e99-950f-7981f359e598.json
index 999070fb..7f5c78d1 100644
--- a/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-20-flash-litegeneratecontent-1c3e0394-1e3e-48e2-bd68-e030c1edc508.json
+++ b/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.0-flash-litegeneratecontent-c270a989-b89b-4e99-950f-7981f359e598.json
@@ -10,7 +10,7 @@
         "role": "model"
       },
       "finishReason": "STOP",
-      "avgLogprobs": -0.062690660357475281
+      "avgLogprobs": -0.07824397087097168
     }
   ],
   "usageMetadata": {
@@ -31,5 +31,5 @@
     ]
   },
   "modelVersion": "gemini-2.0-flash-lite",
-  "responseId": "20mVadS2Kuu_qtsPlJyikQc"
+  "responseId": "O8PWabjkA8CeqtsPmKK7gAU"
 }
diff --git a/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.0-flashgeneratecontent-a4b31000-d0cc-4c65-9d61-b56c70c7f2b4.json b/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.0-flashgeneratecontent-a4b31000-d0cc-4c65-9d61-b56c70c7f2b4.json
new file mode 100644
index 00000000..ffa14d4a
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.0-flashgeneratecontent-a4b31000-d0cc-4c65-9d61-b56c70c7f2b4.json
@@ -0,0 +1,39 @@
+{
+  "candidates": [
+    {
+      "content": {
+        "parts": [
+          {
+            "text": "The image is red."
+          }
+        ],
+        "role": "model"
+      },
+      "finishReason": "STOP",
+      "avgLogprobs": -0.052323949337005612
+    }
+  ],
+  "usageMetadata": {
+    "promptTokenCount": 264,
+    "candidatesTokenCount": 5,
+    "totalTokenCount": 269,
+    "promptTokensDetails": [
+      {
+        "modality": "IMAGE",
+        "tokenCount": 258
+      },
+      {
+        "modality": "TEXT",
+        "tokenCount": 6
+      }
+    ],
+    "candidatesTokensDetails": [
+      {
+        "modality": "TEXT",
+        "tokenCount": 5
+      }
+    ]
+  },
+  "modelVersion": "gemini-2.0-flash",
+  "responseId": "jcLWaeWeKI3xqtsPh4js0QM"
+}
diff --git a/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.5-flashgeneratecontent-fb7fcb0f-1a75-4266-a42e-17703456c088.json b/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.5-flashgeneratecontent-fb7fcb0f-1a75-4266-a42e-17703456c088.json
new file mode 100644
index 00000000..0f0ab7d6
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/google/__files/v1beta_models_gemini-2.5-flashgeneratecontent-fb7fcb0f-1a75-4266-a42e-17703456c088.json
@@ -0,0 +1,30 @@
+{
+  "candidates": [
+    {
+      "content": {
+        "parts": [
+          {
+            "text": "The capital of France is **Paris**."
+          }
+        ],
+        "role": "model"
+      },
+      "finishReason": "STOP",
+      "index": 0
+    }
+  ],
+  "usageMetadata": {
+    "promptTokenCount": 8,
+    "candidatesTokenCount": 8,
+    "totalTokenCount": 37,
+    "promptTokensDetails": [
+      {
+        "modality": "TEXT",
+        "tokenCount": 8
+      }
+    ],
+    "thoughtsTokenCount": 21
+  },
+  "modelVersion": "gemini-2.5-flash",
+  "responseId": "i8LWaZXgCaSRmtkP9_un4A8"
+}
diff --git a/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-20-flash-litegeneratecontent-a3ac84ad-7e12-4fac-9732-3622e4959c01.json b/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.0-flash-litegeneratecontent-9c58a8f9-e6f9-4f5a-921e-cd67c5f91820.json
similarity index 63%
rename from test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-20-flash-litegeneratecontent-a3ac84ad-7e12-4fac-9732-3622e4959c01.json
rename to test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.0-flash-litegeneratecontent-9c58a8f9-e6f9-4f5a-921e-cd67c5f91820.json
index c7fbc12b..72b9776e 100644
--- a/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-20-flash-litegeneratecontent-a3ac84ad-7e12-4fac-9732-3622e4959c01.json
+++ b/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.0-flash-litegeneratecontent-9c58a8f9-e6f9-4f5a-921e-cd67c5f91820.json
@@ -1,6 +1,6 @@
 {
-  "id" : "a3ac84ad-7e12-4fac-9732-3622e4959c01",
-  "name" : "v1beta_models_gemini-20-flash-litegeneratecontent",
+  "id" : "9c58a8f9-e6f9-4f5a-921e-cd67c5f91820",
+  "name" : "v1beta_models_gemini-2.0-flash-litegeneratecontent",
   "request" : {
     "url" : "/v1beta/models/gemini-2.0-flash-lite:generateContent",
     "method" : "POST",
@@ -17,20 +17,21 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1beta_models_gemini-20-flash-litegeneratecontent-a3ac84ad-7e12-4fac-9732-3622e4959c01.json",
+    "bodyFileName" : "v1beta_models_gemini-2.0-flash-litegeneratecontent-9c58a8f9-e6f9-4f5a-921e-cd67c5f91820.json",
     "headers" : {
-      "Content-Type" : "application/json; charset=UTF-8",
-      "Vary" : [ "Origin", "X-Origin", "Referer" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:53 GMT",
-      "Server" : "scaffolding on HTTPServer2",
-      "X-XSS-Protection" : "0",
       "X-Frame-Options" : "SAMEORIGIN",
+      "Alt-Svc" : "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000",
+      "Server" : "scaffolding on HTTPServer2",
       "X-Content-Type-Options" : "nosniff",
-      "Server-Timing" : "gfet4t7; dur=493",
-      "Alt-Svc" : "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000"
+      "Server-Timing" : "gfet4t7; dur=529",
+      "Vary" : [ "Origin", "X-Origin", "Referer" ],
+      "X-Gemini-Service-Tier" : "standard",
+      "X-XSS-Protection" : "0",
+      "Date" : "Wed, 08 Apr 2026 21:06:05 GMT",
+      "Content-Type" : "application/json; charset=UTF-8"
     }
   },
-  "uuid" : "a3ac84ad-7e12-4fac-9732-3622e4959c01",
+  "uuid" : "9c58a8f9-e6f9-4f5a-921e-cd67c5f91820",
   "persistent" : true,
-  "insertionIndex" : 2
+  "insertionIndex" : 3
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-20-flash-litegeneratecontent-1c3e0394-1e3e-48e2-bd68-e030c1edc508.json b/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.0-flash-litegeneratecontent-c270a989-b89b-4e99-950f-7981f359e598.json
similarity index 63%
rename from test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-20-flash-litegeneratecontent-1c3e0394-1e3e-48e2-bd68-e030c1edc508.json
rename to test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.0-flash-litegeneratecontent-c270a989-b89b-4e99-950f-7981f359e598.json
index b336632c..728fcdf0 100644
--- a/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-20-flash-litegeneratecontent-1c3e0394-1e3e-48e2-bd68-e030c1edc508.json
+++ b/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.0-flash-litegeneratecontent-c270a989-b89b-4e99-950f-7981f359e598.json
@@ -1,6 +1,6 @@
 {
-  "id" : "1c3e0394-1e3e-48e2-bd68-e030c1edc508",
-  "name" : "v1beta_models_gemini-20-flash-litegeneratecontent",
+  "id" : "c270a989-b89b-4e99-950f-7981f359e598",
+  "name" : "v1beta_models_gemini-2.0-flash-litegeneratecontent",
   "request" : {
     "url" : "/v1beta/models/gemini-2.0-flash-lite:generateContent",
     "method" : "POST",
@@ -17,20 +17,21 @@
   },
   "response" : {
     "status" : 200,
-    "bodyFileName" : "v1beta_models_gemini-20-flash-litegeneratecontent-1c3e0394-1e3e-48e2-bd68-e030c1edc508.json",
+    "bodyFileName" : "v1beta_models_gemini-2.0-flash-litegeneratecontent-c270a989-b89b-4e99-950f-7981f359e598.json",
     "headers" : {
-      "Content-Type" : "application/json; charset=UTF-8",
-      "Vary" : [ "Origin", "X-Origin", "Referer" ],
-      "Date" : "Wed, 18 Feb 2026 05:10:51 GMT",
-      "Server" : "scaffolding on HTTPServer2",
-      "X-XSS-Protection" : "0",
       "X-Frame-Options" : "SAMEORIGIN",
+      "Alt-Svc" : "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000",
+      "Server" : "scaffolding on HTTPServer2",
       "X-Content-Type-Options" : "nosniff",
-      "Server-Timing" : "gfet4t7; dur=398",
-      "Alt-Svc" : "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000"
+      "Server-Timing" : "gfet4t7; dur=569",
+      "Vary" : [ "Origin", "X-Origin", "Referer" ],
+      "X-Gemini-Service-Tier" : "standard",
+      "X-XSS-Protection" : "0",
+      "Date" : "Wed, 08 Apr 2026 21:06:03 GMT",
+      "Content-Type" : "application/json; charset=UTF-8"
     }
   },
-  "uuid" : "1c3e0394-1e3e-48e2-bd68-e030c1edc508",
+  "uuid" : "c270a989-b89b-4e99-950f-7981f359e598",
   "persistent" : true,
-  "insertionIndex" : 1
+  "insertionIndex" : 4
 }
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.0-flashgeneratecontent-a4b31000-d0cc-4c65-9d61-b56c70c7f2b4.json b/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.0-flashgeneratecontent-a4b31000-d0cc-4c65-9d61-b56c70c7f2b4.json
new file mode 100644
index 00000000..814ac5c4
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.0-flashgeneratecontent-a4b31000-d0cc-4c65-9d61-b56c70c7f2b4.json
@@ -0,0 +1,37 @@
+{
+  "id" : "a4b31000-d0cc-4c65-9d61-b56c70c7f2b4",
+  "name" : "v1beta_models_gemini-2.0-flashgeneratecontent",
+  "request" : {
+    "url" : "/v1beta/models/gemini-2.0-flash:generateContent",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json; charset=UTF-8"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"contents\":[{\"parts\":[{\"text\":\"What color is this image?\"},{\"inlineData\":{\"data\":\"iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8DwHwAFBQIAX8jx0gAAAABJRU5ErkJggg==\",\"mimeType\":\"image/png\"}}],\"role\":\"user\"}],\"generationConfig\":{\"temperature\":0.0}}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1beta_models_gemini-2.0-flashgeneratecontent-a4b31000-d0cc-4c65-9d61-b56c70c7f2b4.json",
+    "headers" : {
+      "X-Frame-Options" : "SAMEORIGIN",
+      "Alt-Svc" : "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000",
+      "Server" : "scaffolding on HTTPServer2",
+      "X-Content-Type-Options" : "nosniff",
+      "Server-Timing" : "gfet4t7; dur=1017",
+      "Vary" : [ "Origin", "X-Origin", "Referer" ],
+      "X-Gemini-Service-Tier" : "standard",
+      "X-XSS-Protection" : "0",
+      "Date" : "Wed, 08 Apr 2026 21:03:10 GMT",
+      "Content-Type" : "application/json; charset=UTF-8"
+    }
+  },
+  "uuid" : "a4b31000-d0cc-4c65-9d61-b56c70c7f2b4",
+  "persistent" : true,
+  "insertionIndex" : 1
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.5-flashgeneratecontent-fb7fcb0f-1a75-4266-a42e-17703456c088.json b/test-harness/src/testFixtures/resources/cassettes/google/mappings/v1beta_models_gemini-2.5-flashgeneratecontent-fb7fcb0f-1a75-4266-a42e-17703456c088.json
new file mode 100644
index 00000000..4787a1e1
--- /dev/null
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@@ -0,0 +1,37 @@
+{
+  "id" : "fb7fcb0f-1a75-4266-a42e-17703456c088",
+  "name" : "v1beta_models_gemini-2.5-flashgeneratecontent",
+  "request" : {
+    "url" : "/v1beta/models/gemini-2.5-flash:generateContent",
+    "method" : "POST",
+    "headers" : {
+      "Content-Type" : {
+        "equalTo" : "application/json; charset=UTF-8"
+      }
+    },
+    "bodyPatterns" : [ {
+      "equalToJson" : "{\"contents\":[{\"parts\":[{\"text\":\"What is the capital of France?\"}],\"role\":\"user\"}],\"generationConfig\":{\"temperature\":0.0}}",
+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
+  "response" : {
+    "status" : 200,
+    "bodyFileName" : "v1beta_models_gemini-2.5-flashgeneratecontent-fb7fcb0f-1a75-4266-a42e-17703456c088.json",
+    "headers" : {
+      "X-Frame-Options" : "SAMEORIGIN",
+      "Alt-Svc" : "h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000",
+      "Server" : "scaffolding on HTTPServer2",
+      "X-Content-Type-Options" : "nosniff",
+      "Server-Timing" : "gfet4t7; dur=2022",
+      "Vary" : [ "Origin", "X-Origin", "Referer" ],
+      "X-Gemini-Service-Tier" : "standard",
+      "X-XSS-Protection" : "0",
+      "Date" : "Wed, 08 Apr 2026 21:03:09 GMT",
+      "Content-Type" : "application/json; charset=UTF-8"
+    }
+  },
+  "uuid" : "fb7fcb0f-1a75-4266-a42e-17703456c088",
+  "persistent" : true,
+  "insertionIndex" : 2
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-089a6408-9111-4b3f-a319-bf0fce726a85.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-089a6408-9111-4b3f-a319-bf0fce726a85.txt
new file mode 100644
index 00000000..67fffa22
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-089a6408-9111-4b3f-a319-bf0fce726a85.txt
@@ -0,0 +1,22 @@
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+
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+
+data: {"id":"chatcmpl-DSUOQXpgmRTnTBU5BwTN0TvX2i0Ay","object":"chat.completion.chunk","created":1775682386,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" capital"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"NmW"}
+
+data: {"id":"chatcmpl-DSUOQXpgmRTnTBU5BwTN0TvX2i0Ay","object":"chat.completion.chunk","created":1775682386,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" of"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"UayC64wc"}
+
+data: {"id":"chatcmpl-DSUOQXpgmRTnTBU5BwTN0TvX2i0Ay","object":"chat.completion.chunk","created":1775682386,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" France"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"0uyo"}
+
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+
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+
+data: {"id":"chatcmpl-DSUOQXpgmRTnTBU5BwTN0TvX2i0Ay","object":"chat.completion.chunk","created":1775682386,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":"."},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"VtyowvEZT1"}
+
+data: {"id":"chatcmpl-DSUOQXpgmRTnTBU5BwTN0TvX2i0Ay","object":"chat.completion.chunk","created":1775682386,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{},"logprobs":null,"finish_reason":"stop"}],"usage":null,"obfuscation":"XRXUC"}
+
+data: {"id":"chatcmpl-DSUOQXpgmRTnTBU5BwTN0TvX2i0Ay","object":"chat.completion.chunk","created":1775682386,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[],"usage":{"prompt_tokens":23,"completion_tokens":7,"total_tokens":30,"prompt_tokens_details":{"cached_tokens":0,"audio_tokens":0},"completion_tokens_details":{"reasoning_tokens":0,"audio_tokens":0,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"obfuscation":"vWcZ04s371R"}
+
+data: [DONE]
+
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-4e899b50-0ef5-4248-a901-0277da96cb5d.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-17ae8af4-8e11-4d29-8a24-84781a770b56.json
similarity index 83%
rename from test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-4e899b50-0ef5-4248-a901-0277da96cb5d.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-17ae8af4-8e11-4d29-8a24-84781a770b56.json
index c9487046..5ead4108 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-4e899b50-0ef5-4248-a901-0277da96cb5d.json
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-17ae8af4-8e11-4d29-8a24-84781a770b56.json
@@ -1,7 +1,7 @@
 {
-  "id": "chatcmpl-DAU7rVvNB4x2Gozm2KeeotRRw4My0",
+  "id": "chatcmpl-DSUOB4AEqMhIvHC9mfXwCdSfcFD9I",
   "object": "chat.completion",
-  "created": 1771391455,
+  "created": 1775682371,
   "model": "gpt-4o-mini-2024-07-18",
   "choices": [
     {
@@ -11,7 +11,7 @@
         "content": null,
         "tool_calls": [
           {
-            "id": "call_kHH3RvRfoqg1BGpR57Db3Fkx",
+            "id": "call_PUTCJuGUHjycxa3b7E7uyYjt",
             "type": "function",
             "function": {
               "name": "getWeather",
@@ -19,7 +19,7 @@
             }
           },
           {
-            "id": "call_timY7A08RNSKw0SG4Ma2SGHV",
+            "id": "call_cACrbs9SRbZN5pBsdIPLfHGj",
             "type": "function",
             "function": {
               "name": "getWeather",
@@ -50,5 +50,5 @@
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   },
   "service_tier": "default",
-  "system_fingerprint": "fp_b4f1283ee2"
+  "system_fingerprint": "fp_a5086b7b9a"
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diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-18f66f91-496d-4640-bdf8-29b64354c4ab.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-18f66f91-496d-4640-bdf8-29b64354c4ab.json
new file mode 100644
index 00000000..dd0fe587
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@@ -0,0 +1,36 @@
+{
+  "id": "chatcmpl-DSUODOHWXn4RLrfwJsxoATF9gGTGQ",
+  "object": "chat.completion",
+  "created": 1775682373,
+  "model": "gpt-4o-mini-2024-07-18",
+  "choices": [
+    {
+      "index": 0,
+      "message": {
+        "role": "assistant",
+        "content": "The current temperature is the same in both Paris and New York, at 72°F.",
+        "refusal": null,
+        "annotations": []
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+      "logprobs": null,
+      "finish_reason": "stop"
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+  "usage": {
+    "prompt_tokens": 169,
+    "completion_tokens": 19,
+    "total_tokens": 188,
+    "prompt_tokens_details": {
+      "cached_tokens": 0,
+      "audio_tokens": 0
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+    "completion_tokens_details": {
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+      "audio_tokens": 0,
+      "accepted_prediction_tokens": 0,
+      "rejected_prediction_tokens": 0
+    }
+  },
+  "service_tier": "default",
+  "system_fingerprint": "fp_a5086b7b9a"
+}
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-1b7db7e7-88d9-4bf9-9256-c70ae797a8a8.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-1b7db7e7-88d9-4bf9-9256-c70ae797a8a8.txt
new file mode 100644
index 00000000..f7b931ba
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+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-1b7db7e7-88d9-4bf9-9256-c70ae797a8a8.txt
@@ -0,0 +1,22 @@
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diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-5818928c-54ce-46f7-96a2-53893dfefce8.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-5656772a-3441-48d3-9e47-68d64cd93f63.json
similarity index 86%
rename from test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-5818928c-54ce-46f7-96a2-53893dfefce8.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-5656772a-3441-48d3-9e47-68d64cd93f63.json
index c402e888..c3b46a84 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-5818928c-54ce-46f7-96a2-53893dfefce8.json
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-5656772a-3441-48d3-9e47-68d64cd93f63.json
@@ -1,7 +1,7 @@
 {
-  "id": "chatcmpl-DMoUtqAPVwlNRwE6gutecKbtj4vfq",
+  "id": "chatcmpl-DSUOa1rdUnLjONUAOYExogUtOp35p",
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-  "created": 1774329699,
+  "created": 1775682396,
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@@ -32,5 +32,5 @@
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   },
   "service_tier": "default",
-  "system_fingerprint": "fp_ca3e7d71bf"
+  "system_fingerprint": "fp_218cd55417"
 }
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-692d5db8-32fd-4a4a-adde-68831cf174bf.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-6bb9d941-64eb-4cc2-987a-edc7066d9b2e.json
similarity index 86%
rename from test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-692d5db8-32fd-4a4a-adde-68831cf174bf.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-6bb9d941-64eb-4cc2-987a-edc7066d9b2e.json
index 9ba616c7..167a0126 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-692d5db8-32fd-4a4a-adde-68831cf174bf.json
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-6bb9d941-64eb-4cc2-987a-edc7066d9b2e.json
@@ -1,7 +1,7 @@
 {
-  "id": "chatcmpl-DG7poskXbjWh4AfJr41noETfYaQWV",
+  "id": "chatcmpl-DSULO7JK8rHJVGfQ55Zw23wcLPELS",
   "object": "chat.completion",
-  "created": 1772735736,
+  "created": 1775682198,
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@@ -32,5 +32,5 @@
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   "service_tier": "default",
-  "system_fingerprint": "fp_373a14eb6f"
+  "system_fingerprint": "fp_218cd55417"
 }
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-7156e61f-ed66-492c-86b1-bf2008a1d56b.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-7156e61f-ed66-492c-86b1-bf2008a1d56b.txt
new file mode 100644
index 00000000..237aaf81
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-7156e61f-ed66-492c-86b1-bf2008a1d56b.txt
@@ -0,0 +1,22 @@
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+
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+
+data: {"id":"chatcmpl-DSUOhMW6hskLRuxoFYmN8Q2m3dhSu","object":"chat.completion.chunk","created":1775682403,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" of"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"RSb1JDkF"}
+
+data: {"id":"chatcmpl-DSUOhMW6hskLRuxoFYmN8Q2m3dhSu","object":"chat.completion.chunk","created":1775682403,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" France"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"1U8Y"}
+
+data: {"id":"chatcmpl-DSUOhMW6hskLRuxoFYmN8Q2m3dhSu","object":"chat.completion.chunk","created":1775682403,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" is"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"gW0UyAmO"}
+
+data: {"id":"chatcmpl-DSUOhMW6hskLRuxoFYmN8Q2m3dhSu","object":"chat.completion.chunk","created":1775682403,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" Paris"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"52oeQ"}
+
+data: {"id":"chatcmpl-DSUOhMW6hskLRuxoFYmN8Q2m3dhSu","object":"chat.completion.chunk","created":1775682403,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":"."},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"YM4WY91n99"}
+
+data: {"id":"chatcmpl-DSUOhMW6hskLRuxoFYmN8Q2m3dhSu","object":"chat.completion.chunk","created":1775682403,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{},"logprobs":null,"finish_reason":"stop"}],"usage":null,"obfuscation":"Bxos4"}
+
+data: {"id":"chatcmpl-DSUOhMW6hskLRuxoFYmN8Q2m3dhSu","object":"chat.completion.chunk","created":1775682403,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[],"usage":{"prompt_tokens":14,"completion_tokens":7,"total_tokens":21,"prompt_tokens_details":{"cached_tokens":0,"audio_tokens":0},"completion_tokens_details":{"reasoning_tokens":0,"audio_tokens":0,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"obfuscation":"lQbxXoYufnx"}
+
+data: [DONE]
+
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-751a7200-62cc-4c4b-8324-00024a9462bf.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-751a7200-62cc-4c4b-8324-00024a9462bf.txt
deleted file mode 100644
index 1e5c7634..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-751a7200-62cc-4c4b-8324-00024a9462bf.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-data: {"id":"chatcmpl-DG7pqqsKv0NEV256aO26UdvKmKajT","object":"chat.completion.chunk","created":1772735738,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"role":"assistant","content":"","refusal":null},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"WsYpYuOPq"}
-
-data: {"id":"chatcmpl-DG7pqqsKv0NEV256aO26UdvKmKajT","object":"chat.completion.chunk","created":1772735738,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":"The"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"K6LcK9m7"}
-
-data: {"id":"chatcmpl-DG7pqqsKv0NEV256aO26UdvKmKajT","object":"chat.completion.chunk","created":1772735738,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" capital"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"xk4"}
-
-data: {"id":"chatcmpl-DG7pqqsKv0NEV256aO26UdvKmKajT","object":"chat.completion.chunk","created":1772735738,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" of"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"8GO7Zp8X"}
-
-data: {"id":"chatcmpl-DG7pqqsKv0NEV256aO26UdvKmKajT","object":"chat.completion.chunk","created":1772735738,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" France"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"lO3Q"}
-
-data: {"id":"chatcmpl-DG7pqqsKv0NEV256aO26UdvKmKajT","object":"chat.completion.chunk","created":1772735738,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" is"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"RLgLuE76"}
-
-data: {"id":"chatcmpl-DG7pqqsKv0NEV256aO26UdvKmKajT","object":"chat.completion.chunk","created":1772735738,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" Paris"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"FtxdW"}
-
-data: {"id":"chatcmpl-DG7pqqsKv0NEV256aO26UdvKmKajT","object":"chat.completion.chunk","created":1772735738,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":"."},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"BLPWIIBZ6O"}
-
-data: {"id":"chatcmpl-DG7pqqsKv0NEV256aO26UdvKmKajT","object":"chat.completion.chunk","created":1772735738,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{},"logprobs":null,"finish_reason":"stop"}],"usage":null,"obfuscation":"DTNO5"}
-
-data: {"id":"chatcmpl-DG7pqqsKv0NEV256aO26UdvKmKajT","object":"chat.completion.chunk","created":1772735738,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[],"usage":{"prompt_tokens":23,"completion_tokens":7,"total_tokens":30,"prompt_tokens_details":{"cached_tokens":0,"audio_tokens":0},"completion_tokens_details":{"reasoning_tokens":0,"audio_tokens":0,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"obfuscation":"7e6UOJ8rC4E"}
-
-data: [DONE]
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-1b32d91a-cccf-4083-89d8-c6704238514d.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-9819566d-fadf-4f70-a8f6-75f778f99918.json
similarity index 86%
rename from test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-1b32d91a-cccf-4083-89d8-c6704238514d.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-9819566d-fadf-4f70-a8f6-75f778f99918.json
index b53cf402..8cff0236 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-1b32d91a-cccf-4083-89d8-c6704238514d.json
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-9819566d-fadf-4f70-a8f6-75f778f99918.json
@@ -1,7 +1,7 @@
 {
-  "id": "chatcmpl-DFn04K70Wc2N4emgclLjhKrHId53W",
+  "id": "chatcmpl-DSULM9laEiaokiiQ3NEYRIAgF2g8W",
   "object": "chat.completion",
-  "created": 1772655648,
+  "created": 1775682196,
   "model": "gpt-4o-mini-2024-07-18",
   "choices": [
     {
@@ -32,5 +32,5 @@
     }
   },
   "service_tier": "default",
-  "system_fingerprint": "fp_373a14eb6f"
+  "system_fingerprint": "fp_218cd55417"
 }
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-9e4757a5-01e8-45d7-a2ea-fce13f052e3f.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-9e4757a5-01e8-45d7-a2ea-fce13f052e3f.json
deleted file mode 100644
index 19e34d87..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-9e4757a5-01e8-45d7-a2ea-fce13f052e3f.json
+++ /dev/null
@@ -1,36 +0,0 @@
-{
-  "id": "chatcmpl-DG74Obaox9fWVr8dhxGjECoHuOIBk",
-  "object": "chat.completion",
-  "created": 1772732796,
-  "model": "gpt-4o-mini-2024-07-18",
-  "choices": [
-    {
-      "index": 0,
-      "message": {
-        "role": "assistant",
-        "content": "The capital of France is Paris.",
-        "refusal": null,
-        "annotations": []
-      },
-      "logprobs": null,
-      "finish_reason": "stop"
-    }
-  ],
-  "usage": {
-    "prompt_tokens": 23,
-    "completion_tokens": 7,
-    "total_tokens": 30,
-    "prompt_tokens_details": {
-      "cached_tokens": 0,
-      "audio_tokens": 0
-    },
-    "completion_tokens_details": {
-      "reasoning_tokens": 0,
-      "audio_tokens": 0,
-      "accepted_prediction_tokens": 0,
-      "rejected_prediction_tokens": 0
-    }
-  },
-  "service_tier": "default",
-  "system_fingerprint": "fp_373a14eb6f"
-}
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-9fd6e4cb-b14b-4cc4-bbe7-3b6c9b07fb37.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-9fd6e4cb-b14b-4cc4-bbe7-3b6c9b07fb37.txt
deleted file mode 100644
index 21784673..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-9fd6e4cb-b14b-4cc4-bbe7-3b6c9b07fb37.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-data: {"id":"chatcmpl-DAU7q4IuiWNv0hEr2zzW1dZ6jRYgt","object":"chat.completion.chunk","created":1771391454,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"role":"assistant","content":"","refusal":null},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"Stx61Q5z8"}
-
-data: {"id":"chatcmpl-DAU7q4IuiWNv0hEr2zzW1dZ6jRYgt","object":"chat.completion.chunk","created":1771391454,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":"The"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"ArOTVm2G"}
-
-data: {"id":"chatcmpl-DAU7q4IuiWNv0hEr2zzW1dZ6jRYgt","object":"chat.completion.chunk","created":1771391454,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" capital"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"s0C"}
-
-data: {"id":"chatcmpl-DAU7q4IuiWNv0hEr2zzW1dZ6jRYgt","object":"chat.completion.chunk","created":1771391454,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" of"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"2nOrDlXS"}
-
-data: {"id":"chatcmpl-DAU7q4IuiWNv0hEr2zzW1dZ6jRYgt","object":"chat.completion.chunk","created":1771391454,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" France"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"Je3d"}
-
-data: {"id":"chatcmpl-DAU7q4IuiWNv0hEr2zzW1dZ6jRYgt","object":"chat.completion.chunk","created":1771391454,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" is"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"yFpRen32"}
-
-data: {"id":"chatcmpl-DAU7q4IuiWNv0hEr2zzW1dZ6jRYgt","object":"chat.completion.chunk","created":1771391454,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" Paris"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"uPTQq"}
-
-data: {"id":"chatcmpl-DAU7q4IuiWNv0hEr2zzW1dZ6jRYgt","object":"chat.completion.chunk","created":1771391454,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":"."},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"f6wUQTV8CZ"}
-
-data: {"id":"chatcmpl-DAU7q4IuiWNv0hEr2zzW1dZ6jRYgt","object":"chat.completion.chunk","created":1771391454,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{},"logprobs":null,"finish_reason":"stop"}],"usage":null,"obfuscation":"P96jq"}
-
-data: {"id":"chatcmpl-DAU7q4IuiWNv0hEr2zzW1dZ6jRYgt","object":"chat.completion.chunk","created":1771391454,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[],"usage":{"prompt_tokens":14,"completion_tokens":7,"total_tokens":21,"prompt_tokens_details":{"cached_tokens":0,"audio_tokens":0},"completion_tokens_details":{"reasoning_tokens":0,"audio_tokens":0,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"obfuscation":"iVjf4vuXwe2"}
-
-data: [DONE]
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-b01eaa78-92e7-4c32-9c5a-5d5c682c1eab.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-b01eaa78-92e7-4c32-9c5a-5d5c682c1eab.txt
deleted file mode 100644
index 9c63354c..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-b01eaa78-92e7-4c32-9c5a-5d5c682c1eab.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-data: {"id":"chatcmpl-DG7ppH9OCTGChYdWCP6xYrQRKjPMX","object":"chat.completion.chunk","created":1772735737,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"role":"assistant","content":"","refusal":null},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"EKXH5Htd2"}
-
-data: {"id":"chatcmpl-DG7ppH9OCTGChYdWCP6xYrQRKjPMX","object":"chat.completion.chunk","created":1772735737,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":"The"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"9tinMgFn"}
-
-data: {"id":"chatcmpl-DG7ppH9OCTGChYdWCP6xYrQRKjPMX","object":"chat.completion.chunk","created":1772735737,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" capital"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"pcs"}
-
-data: {"id":"chatcmpl-DG7ppH9OCTGChYdWCP6xYrQRKjPMX","object":"chat.completion.chunk","created":1772735737,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" of"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"MCXLWOa0"}
-
-data: {"id":"chatcmpl-DG7ppH9OCTGChYdWCP6xYrQRKjPMX","object":"chat.completion.chunk","created":1772735737,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" France"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"5QjV"}
-
-data: {"id":"chatcmpl-DG7ppH9OCTGChYdWCP6xYrQRKjPMX","object":"chat.completion.chunk","created":1772735737,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" is"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"GSpqntqG"}
-
-data: {"id":"chatcmpl-DG7ppH9OCTGChYdWCP6xYrQRKjPMX","object":"chat.completion.chunk","created":1772735737,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" Paris"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"oQDhe"}
-
-data: {"id":"chatcmpl-DG7ppH9OCTGChYdWCP6xYrQRKjPMX","object":"chat.completion.chunk","created":1772735737,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":"."},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"FolAg0gArn"}
-
-data: {"id":"chatcmpl-DG7ppH9OCTGChYdWCP6xYrQRKjPMX","object":"chat.completion.chunk","created":1772735737,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{},"logprobs":null,"finish_reason":"stop"}],"usage":null,"obfuscation":"fKZG2"}
-
-data: {"id":"chatcmpl-DG7ppH9OCTGChYdWCP6xYrQRKjPMX","object":"chat.completion.chunk","created":1772735737,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[],"usage":{"prompt_tokens":23,"completion_tokens":7,"total_tokens":30,"prompt_tokens_details":{"cached_tokens":0,"audio_tokens":0},"completion_tokens_details":{"reasoning_tokens":0,"audio_tokens":0,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"obfuscation":"LwH5xWDncfN"}
-
-data: [DONE]
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-b6c36230-9ebd-4831-88bf-5dfb2988edea.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-b6c36230-9ebd-4831-88bf-5dfb2988edea.json
new file mode 100644
index 00000000..d939c2c6
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-b6c36230-9ebd-4831-88bf-5dfb2988edea.json
@@ -0,0 +1,36 @@
+{
+  "id": "chatcmpl-DSULBJI1x2YYGJ3vuSw2dp605uycF",
+  "object": "chat.completion",
+  "created": 1775682185,
+  "model": "gpt-4o-mini-2024-07-18",
+  "choices": [
+    {
+      "index": 0,
+      "message": {
+        "role": "assistant",
+        "content": "The image is red.",
+        "refusal": null,
+        "annotations": []
+      },
+      "logprobs": null,
+      "finish_reason": "stop"
+    }
+  ],
+  "usage": {
+    "prompt_tokens": 2855,
+    "completion_tokens": 5,
+    "total_tokens": 2860,
+    "prompt_tokens_details": {
+      "cached_tokens": 0,
+      "audio_tokens": 0
+    },
+    "completion_tokens_details": {
+      "reasoning_tokens": 0,
+      "audio_tokens": 0,
+      "accepted_prediction_tokens": 0,
+      "rejected_prediction_tokens": 0
+    }
+  },
+  "service_tier": "default",
+  "system_fingerprint": "fp_a5086b7b9a"
+}
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-b70b2684-b6b0-42e3-8d18-ad0ff374e753.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-b70b2684-b6b0-42e3-8d18-ad0ff374e753.json
deleted file mode 100644
index 98c0321a..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-b70b2684-b6b0-42e3-8d18-ad0ff374e753.json
+++ /dev/null
@@ -1,36 +0,0 @@
-{
-  "id": "chatcmpl-DG74QX3bDc8f7mN31mXJ5ZxLiVGhS",
-  "object": "chat.completion",
-  "created": 1772732798,
-  "model": "gpt-4o-mini-2024-07-18",
-  "choices": [
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-      "index": 0,
-      "message": {
-        "role": "assistant",
-        "content": "The capital of France is Paris.",
-        "refusal": null,
-        "annotations": []
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-      "logprobs": null,
-      "finish_reason": "stop"
-    }
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-    "total_tokens": 30,
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-  },
-  "service_tier": "default",
-  "system_fingerprint": "fp_373a14eb6f"
-}
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-c05d239e-fcb5-45ff-9ff1-2c4fe5a1dcdf.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-c05d239e-fcb5-45ff-9ff1-2c4fe5a1dcdf.json
new file mode 100644
index 00000000..d1c350f1
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-c05d239e-fcb5-45ff-9ff1-2c4fe5a1dcdf.json
@@ -0,0 +1,36 @@
+{
+  "id": "chatcmpl-DSULAHYU8qeyKaGrFPw51y6egAflx",
+  "object": "chat.completion",
+  "created": 1775682184,
+  "model": "gpt-4o-mini-2024-07-18",
+  "choices": [
+    {
+      "index": 0,
+      "message": {
+        "role": "assistant",
+        "content": "The image is red.",
+        "refusal": null,
+        "annotations": []
+      },
+      "logprobs": null,
+      "finish_reason": "stop"
+    }
+  ],
+  "usage": {
+    "prompt_tokens": 8522,
+    "completion_tokens": 5,
+    "total_tokens": 8527,
+    "prompt_tokens_details": {
+      "cached_tokens": 0,
+      "audio_tokens": 0
+    },
+    "completion_tokens_details": {
+      "reasoning_tokens": 0,
+      "audio_tokens": 0,
+      "accepted_prediction_tokens": 0,
+      "rejected_prediction_tokens": 0
+    }
+  },
+  "service_tier": "default",
+  "system_fingerprint": "fp_a5086b7b9a"
+}
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d09661be-dc30-4efd-a105-849e05b49ef6.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d09661be-dc30-4efd-a105-849e05b49ef6.txt
deleted file mode 100644
index bc7e8b59..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d09661be-dc30-4efd-a105-849e05b49ef6.txt
+++ /dev/null
@@ -1,22 +0,0 @@
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-data: {"id":"chatcmpl-DMoV1a2qyBOgoTIDIoavr1NecqPMo","object":"chat.completion.chunk","created":1774329707,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_ca3e7d71bf","choices":[{"index":0,"delta":{"content":"The"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"MqotWQ3X"}
-
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-data: {"id":"chatcmpl-DMoV1a2qyBOgoTIDIoavr1NecqPMo","object":"chat.completion.chunk","created":1774329707,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_ca3e7d71bf","choices":[{"index":0,"delta":{"content":" is"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"hjfzEYDh"}
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-
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-
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-66ebfe33-532e-4d37-9eef-f52073d3852b.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d14e2e70-8bd9-4b59-9276-ba6ff15e1b75.json
similarity index 86%
rename from test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-66ebfe33-532e-4d37-9eef-f52073d3852b.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d14e2e70-8bd9-4b59-9276-ba6ff15e1b75.json
index 47663f69..0d4a3681 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-66ebfe33-532e-4d37-9eef-f52073d3852b.json
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d14e2e70-8bd9-4b59-9276-ba6ff15e1b75.json
@@ -1,7 +1,7 @@
 {
-  "id": "chatcmpl-DMoUwruWZjMy42fUPqe2tLCjc0yWt",
+  "id": "chatcmpl-DSUOeF433yXQPu4UOELkNNDRDlzER",
   "object": "chat.completion",
-  "created": 1774329702,
+  "created": 1775682400,
   "model": "gpt-4o-mini-2024-07-18",
   "choices": [
     {
@@ -32,5 +32,5 @@
     }
   },
   "service_tier": "default",
-  "system_fingerprint": "fp_ca3e7d71bf"
+  "system_fingerprint": "fp_218cd55417"
 }
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-22dbf888-ee29-4f5e-962b-b3e5eebb9960.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d22462cb-f90a-487c-854a-5eb7eefb6ec6.json
similarity index 86%
rename from test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-22dbf888-ee29-4f5e-962b-b3e5eebb9960.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d22462cb-f90a-487c-854a-5eb7eefb6ec6.json
index 56a4cc11..749a552f 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-22dbf888-ee29-4f5e-962b-b3e5eebb9960.json
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d22462cb-f90a-487c-854a-5eb7eefb6ec6.json
@@ -1,7 +1,7 @@
 {
-  "id": "chatcmpl-DAU7waGRaT5BKPt89hGkVZvFZ0FNo",
+  "id": "chatcmpl-DSUOTrFjVjnQlwbGWJUeMTRuDvFnx",
   "object": "chat.completion",
-  "created": 1771391460,
+  "created": 1775682389,
   "model": "gpt-4o-mini-2024-07-18",
   "choices": [
     {
@@ -32,5 +32,5 @@
     }
   },
   "service_tier": "default",
-  "system_fingerprint": "fp_373a14eb6f"
+  "system_fingerprint": "fp_218cd55417"
 }
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d85c53f2-ef38-4e4b-88a4-f3c86ee4e287.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d85c53f2-ef38-4e4b-88a4-f3c86ee4e287.json
new file mode 100644
index 00000000..f363cf12
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-d85c53f2-ef38-4e4b-88a4-f3c86ee4e287.json
@@ -0,0 +1,46 @@
+{
+  "id": "chatcmpl-DSULBNH3jWDklcDIvE7UVo0oNVt8P",
+  "object": "chat.completion",
+  "created": 1775682185,
+  "model": "gpt-4o-2024-08-06",
+  "choices": [
+    {
+      "index": 0,
+      "message": {
+        "role": "assistant",
+        "content": null,
+        "tool_calls": [
+          {
+            "id": "call_HiwiY5ORXsemdYXuRF4VATjh",
+            "type": "function",
+            "function": {
+              "name": "get_weather",
+              "arguments": "{\"location\":\"Paris, France\"}"
+            }
+          }
+        ],
+        "refusal": null,
+        "annotations": []
+      },
+      "logprobs": null,
+      "finish_reason": "tool_calls"
+    }
+  ],
+  "usage": {
+    "prompt_tokens": 80,
+    "completion_tokens": 16,
+    "total_tokens": 96,
+    "prompt_tokens_details": {
+      "cached_tokens": 0,
+      "audio_tokens": 0
+    },
+    "completion_tokens_details": {
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+      "rejected_prediction_tokens": 0
+    }
+  },
+  "service_tier": "default",
+  "system_fingerprint": "fp_621b5a0858"
+}
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-e01d7a59-78ca-4a24-b52f-55f3375b2e24.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-e01d7a59-78ca-4a24-b52f-55f3375b2e24.json
deleted file mode 100644
index f9e43102..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-e01d7a59-78ca-4a24-b52f-55f3375b2e24.json
+++ /dev/null
@@ -1,36 +0,0 @@
-{
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-  "model": "gpt-4o-mini-2024-07-18",
-  "choices": [
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-        "refusal": null,
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diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-e2bf36d0-37c4-4e63-9e8c-c155759089f5.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-e2bf36d0-37c4-4e63-9e8c-c155759089f5.txt
deleted file mode 100644
index e12dca79..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-e2bf36d0-37c4-4e63-9e8c-c155759089f5.txt
+++ /dev/null
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diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-e71f98de-da03-4d4a-a4e7-3a84826d3d7e.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-e71f98de-da03-4d4a-a4e7-3a84826d3d7e.txt
deleted file mode 100644
index 79694f89..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-e71f98de-da03-4d4a-a4e7-3a84826d3d7e.txt
+++ /dev/null
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diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-eea32a97-7092-4b21-93b0-5d4b1619fce1.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-eea32a97-7092-4b21-93b0-5d4b1619fce1.json
new file mode 100644
index 00000000..7147201e
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-eea32a97-7092-4b21-93b0-5d4b1619fce1.json
@@ -0,0 +1,36 @@
+{
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+  "object": "chat.completion",
+  "created": 1775682186,
+  "model": "gpt-4o-mini-2024-07-18",
+  "choices": [
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+      "finish_reason": "stop"
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+      "rejected_prediction_tokens": 0
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+  "system_fingerprint": "fp_a5086b7b9a"
+}
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-8edce6d1-4c7f-404e-bd3d-031116dba7bf.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f1292470-1835-4b64-b316-3a77df4e9d9b.json
similarity index 86%
rename from test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-8edce6d1-4c7f-404e-bd3d-031116dba7bf.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f1292470-1835-4b64-b316-3a77df4e9d9b.json
index af7c442c..1e40ddbc 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-8edce6d1-4c7f-404e-bd3d-031116dba7bf.json
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f1292470-1835-4b64-b316-3a77df4e9d9b.json
@@ -1,7 +1,7 @@
 {
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+  "id": "chatcmpl-DSUOEYrBQ7sMutprt5v95aOikcL89",
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-  "created": 1771391457,
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-  "system_fingerprint": "fp_373a14eb6f"
+  "system_fingerprint": "fp_218cd55417"
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diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f19b40d4-4b5b-4d7b-accc-cc484a48e5b3.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f19b40d4-4b5b-4d7b-accc-cc484a48e5b3.txt
deleted file mode 100644
index 9dae5ac6..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f19b40d4-4b5b-4d7b-accc-cc484a48e5b3.txt
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-
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-
-data: {"id":"chatcmpl-DG74PksDb68x2U3ZMMZERPaMXAt5L","object":"chat.completion.chunk","created":1772732797,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[{"index":0,"delta":{"content":" is"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"euxNnwP1"}
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-
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-
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-data: {"id":"chatcmpl-DG74PksDb68x2U3ZMMZERPaMXAt5L","object":"chat.completion.chunk","created":1772732797,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_373a14eb6f","choices":[],"usage":{"prompt_tokens":23,"completion_tokens":7,"total_tokens":30,"prompt_tokens_details":{"cached_tokens":0,"audio_tokens":0},"completion_tokens_details":{"reasoning_tokens":0,"audio_tokens":0,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"obfuscation":"JK3RALpiFyh"}
-
-data: [DONE]
-
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f2e10e3b-639e-41f1-8e92-2cefb31f30ea.txt b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f2e10e3b-639e-41f1-8e92-2cefb31f30ea.txt
new file mode 100644
index 00000000..af6c4f6a
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f2e10e3b-639e-41f1-8e92-2cefb31f30ea.txt
@@ -0,0 +1,22 @@
+data: {"id":"chatcmpl-DSUOA8ZHvtHxxTrWReBJ3fyGGMEkh","object":"chat.completion.chunk","created":1775682370,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"role":"assistant","content":"","refusal":null},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"wBm8qVRHX"}
+
+data: {"id":"chatcmpl-DSUOA8ZHvtHxxTrWReBJ3fyGGMEkh","object":"chat.completion.chunk","created":1775682370,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":"The"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"GxaDZP4V"}
+
+data: {"id":"chatcmpl-DSUOA8ZHvtHxxTrWReBJ3fyGGMEkh","object":"chat.completion.chunk","created":1775682370,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" capital"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"giP"}
+
+data: {"id":"chatcmpl-DSUOA8ZHvtHxxTrWReBJ3fyGGMEkh","object":"chat.completion.chunk","created":1775682370,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" of"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"P6fD2xy4"}
+
+data: {"id":"chatcmpl-DSUOA8ZHvtHxxTrWReBJ3fyGGMEkh","object":"chat.completion.chunk","created":1775682370,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" France"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"Ifyc"}
+
+data: {"id":"chatcmpl-DSUOA8ZHvtHxxTrWReBJ3fyGGMEkh","object":"chat.completion.chunk","created":1775682370,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" is"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"PKrUkMhy"}
+
+data: {"id":"chatcmpl-DSUOA8ZHvtHxxTrWReBJ3fyGGMEkh","object":"chat.completion.chunk","created":1775682370,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":" Paris"},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"0pUB1"}
+
+data: {"id":"chatcmpl-DSUOA8ZHvtHxxTrWReBJ3fyGGMEkh","object":"chat.completion.chunk","created":1775682370,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{"content":"."},"logprobs":null,"finish_reason":null}],"usage":null,"obfuscation":"pCBjCVs319"}
+
+data: {"id":"chatcmpl-DSUOA8ZHvtHxxTrWReBJ3fyGGMEkh","object":"chat.completion.chunk","created":1775682370,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[{"index":0,"delta":{},"logprobs":null,"finish_reason":"stop"}],"usage":null,"obfuscation":"QvOu1"}
+
+data: {"id":"chatcmpl-DSUOA8ZHvtHxxTrWReBJ3fyGGMEkh","object":"chat.completion.chunk","created":1775682370,"model":"gpt-4o-mini-2024-07-18","service_tier":"default","system_fingerprint":"fp_218cd55417","choices":[],"usage":{"prompt_tokens":14,"completion_tokens":7,"total_tokens":21,"prompt_tokens_details":{"cached_tokens":0,"audio_tokens":0},"completion_tokens_details":{"reasoning_tokens":0,"audio_tokens":0,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"obfuscation":"FvYqszs6qOY"}
+
+data: [DONE]
+
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-8306fcb1-24bb-4510-8a32-dddb526d55e3.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f422b33f-a11a-4675-be52-819616f86fb7.json
similarity index 86%
rename from test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-8306fcb1-24bb-4510-8a32-dddb526d55e3.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f422b33f-a11a-4675-be52-819616f86fb7.json
index 4bf268d1..664519b9 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-8306fcb1-24bb-4510-8a32-dddb526d55e3.json
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-f422b33f-a11a-4675-be52-819616f86fb7.json
@@ -1,7 +1,7 @@
 {
-  "id": "chatcmpl-DG7prWVGCPVOYgEfpt0rBiuEWB8yl",
+  "id": "chatcmpl-DSULLdSTQ4IFiTJTNra26Abtr7RIf",
   "object": "chat.completion",
-  "created": 1772735739,
+  "created": 1775682195,
   "model": "gpt-4o-mini-2024-07-18",
   "choices": [
     {
@@ -32,5 +32,5 @@
     }
   },
   "service_tier": "default",
-  "system_fingerprint": "fp_373a14eb6f"
+  "system_fingerprint": "fp_218cd55417"
 }
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-fb594c07-3adf-4ff4-89d3-ac011f487888.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-fb594c07-3adf-4ff4-89d3-ac011f487888.json
new file mode 100644
index 00000000..c49bcabe
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/chat_completions-fb594c07-3adf-4ff4-89d3-ac011f487888.json
@@ -0,0 +1,36 @@
+{
+  "id": "chatcmpl-DSUOPBQBPfjK0liQtuSrhXL3IS9qU",
+  "object": "chat.completion",
+  "created": 1775682385,
+  "model": "gpt-4o-mini-2024-07-18",
+  "choices": [
+    {
+      "index": 0,
+      "message": {
+        "role": "assistant",
+        "content": "The capital of France is Paris.",
+        "refusal": null,
+        "annotations": []
+      },
+      "logprobs": null,
+      "finish_reason": "stop"
+    }
+  ],
+  "usage": {
+    "prompt_tokens": 23,
+    "completion_tokens": 7,
+    "total_tokens": 30,
+    "prompt_tokens_details": {
+      "cached_tokens": 0,
+      "audio_tokens": 0
+    },
+    "completion_tokens_details": {
+      "reasoning_tokens": 0,
+      "audio_tokens": 0,
+      "accepted_prediction_tokens": 0,
+      "rejected_prediction_tokens": 0
+    }
+  },
+  "service_tier": "default",
+  "system_fingerprint": "fp_218cd55417"
+}
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-04e71a83-68b4-4fae-8dde-8231eda3de69.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-04e71a83-68b4-4fae-8dde-8231eda3de69.json
new file mode 100644
index 00000000..d1ec354d
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-04e71a83-68b4-4fae-8dde-8231eda3de69.json
@@ -0,0 +1,85 @@
+{
+  "id": "resp_077f768058f266c60069d6c2a553f881959cf55b77225bae66",
+  "object": "response",
+  "created_at": 1775682213,
+  "status": "completed",
+  "background": false,
+  "billing": {
+    "payer": "developer"
+  },
+  "completed_at": 1775682221,
+  "error": null,
+  "frequency_penalty": 0.0,
+  "incomplete_details": null,
+  "instructions": null,
+  "max_output_tokens": null,
+  "max_tool_calls": null,
+  "model": "o4-mini-2025-04-16",
+  "output": [
+    {
+      "id": "rs_077f768058f266c60069d6c2a5f0dc819583e17b2822b688d9",
+      "type": "reasoning",
+      "summary": [
+        {
+          "type": "summary_text",
+          "text": "**Calculating terms and sum**\n\nI need to find the 10th term of the sequence represented by 2, 6, 12, 20, and 30, which follows the formula a_n = n(n+1). For n=10, a10 = 10 * 11 = 110. \n\nNext, I'll calculate the sum of the first 10 terms. Using the sum formula, it equals S = sum of n^2 plus sum of n. I find S = 440 for both methods, either by directly summing or using another sum formula. So, the answers are a10 = 110 and the total sum is 440."
+        },
+        {
+          "type": "summary_text",
+          "text": "**Presenting results simply**\n\nI think keeping the formatting straightforward is a good idea. The 10th term is a10 = 110, and the sum of the first 10 terms is 440. This way, the information is clear and easy to understand. I feel satisfied with these results, and I\u2019ll go ahead and deliver this information without any complications. Simplicity often works best, after all!"
+        }
+      ]
+    },
+    {
+      "id": "msg_077f768058f266c60069d6c2ad2548819584f260de71659b37",
+      "type": "message",
+      "status": "completed",
+      "content": [
+        {
+          "type": "output_text",
+          "annotations": [],
+          "logprobs": [],
+          "text": "The 10th term is  \na\u2081\u2080 = 10\u00b7(10 + 1) = 10\u00b711 = 110.  \n\nThe sum of the first 10 terms is  \nS\u2081\u2080 = \u2211\u2099\u208c\u2081\u00b9\u2070 n(n+1) = \u2211n\u00b2 + \u2211n  \n    = [10\u00b711\u00b721\u20446] + [10\u00b711\u20442]  \n    = 385 + 55  \n    = 440.  \n\nEquivalently, there\u2019s a closed\u2010form  \nS\u2081\u2080 = 10\u00b711\u00b712\u20443 = 440."
+        }
+      ],
+      "role": "assistant"
+    }
+  ],
+  "parallel_tool_calls": true,
+  "presence_penalty": 0.0,
+  "previous_response_id": null,
+  "prompt_cache_key": null,
+  "prompt_cache_retention": null,
+  "reasoning": {
+    "effort": "high",
+    "summary": "detailed"
+  },
+  "safety_identifier": null,
+  "service_tier": "default",
+  "store": true,
+  "temperature": 1.0,
+  "text": {
+    "format": {
+      "type": "text"
+    },
+    "verbosity": "medium"
+  },
+  "tool_choice": "auto",
+  "tools": [],
+  "top_logprobs": 0,
+  "top_p": 1.0,
+  "truncation": "disabled",
+  "usage": {
+    "input_tokens": 299,
+    "input_tokens_details": {
+      "cached_tokens": 0
+    },
+    "output_tokens": 518,
+    "output_tokens_details": {
+      "reasoning_tokens": 320
+    },
+    "total_tokens": 817
+  },
+  "user": null,
+  "metadata": {}
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-086e4f73-7e85-49fa-bfb9-b055e2787b0e.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-086e4f73-7e85-49fa-bfb9-b055e2787b0e.json
new file mode 100644
index 00000000..4b0d4277
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-086e4f73-7e85-49fa-bfb9-b055e2787b0e.json
@@ -0,0 +1,85 @@
+{
+  "id": "resp_057e67b8f6bc5bec0069d6c287945881968677003e16a39746",
+  "object": "response",
+  "created_at": 1775682183,
+  "status": "completed",
+  "background": false,
+  "billing": {
+    "payer": "developer"
+  },
+  "completed_at": 1775682195,
+  "error": null,
+  "frequency_penalty": 0.0,
+  "incomplete_details": null,
+  "instructions": null,
+  "max_output_tokens": null,
+  "max_tool_calls": null,
+  "model": "o4-mini-2025-04-16",
+  "output": [
+    {
+      "id": "rs_057e67b8f6bc5bec0069d6c288348881968097f72c458b4b6a",
+      "type": "reasoning",
+      "summary": [
+        {
+          "type": "summary_text",
+          "text": "**Identifying the sequence pattern**\n\nThe user has shared a sequence: 2, 6, 12, 20, 30. I\u2019m noticing this follows the pattern of n(n+1). Basically, for n=1 to 5, I have 1*2=2, 2*3=6, and so on. So, the nth term can be expressed as T_n = n(n+1) or n^2 + n. These numbers are pronic or oblong numbers as well. I can also see that they align with triangular numbers multiplied by 2. Ultimately, I think the formula is simply a_n = n(n+1)."
+        },
+        {
+          "type": "summary_text",
+          "text": "**Defining the pronic numbers**\n\nSo starting from n\u22651, I see that the nth term can be expressed as T_n = n(n+1), indicating that these numbers are pronic numbers, which are products of two consecutive integers. The differences between the terms increase by 2 each time (4, 6, 8, 10), confirming it's a quadratic pattern. I\u2019ve derived that a_n = n^2 + n fits this sequence. If starting at n=0, the formula adjusts to a_n = (n+1)(n+2). So, a_n = n(n+1) is a straightforward answer!"
+        }
+      ]
+    },
+    {
+      "id": "msg_057e67b8f6bc5bec0069d6c293acec819691d5b3c799159dad",
+      "type": "message",
+      "status": "completed",
+      "content": [
+        {
+          "type": "output_text",
+          "annotations": [],
+          "logprobs": [],
+          "text": "The terms are  \n 2 = 1\u00b72  \n 6 = 2\u00b73  \n12 = 3\u00b74  \n20 = 4\u00b75  \n30 = 5\u00b76  \n\nIn other words, the n-th term is the product of two consecutive integers.  Equivalently\n\n\u2002a\u2099 = n(n + 1) = n\u00b2 + n, \u2002for n = 1, 2, 3, \u2026"
+        }
+      ],
+      "role": "assistant"
+    }
+  ],
+  "parallel_tool_calls": true,
+  "presence_penalty": 0.0,
+  "previous_response_id": null,
+  "prompt_cache_key": null,
+  "prompt_cache_retention": null,
+  "reasoning": {
+    "effort": "high",
+    "summary": "detailed"
+  },
+  "safety_identifier": null,
+  "service_tier": "default",
+  "store": true,
+  "temperature": 1.0,
+  "text": {
+    "format": {
+      "type": "text"
+    },
+    "verbosity": "medium"
+  },
+  "tool_choice": "auto",
+  "tools": [],
+  "top_logprobs": 0,
+  "top_p": 1.0,
+  "truncation": "disabled",
+  "usage": {
+    "input_tokens": 41,
+    "input_tokens_details": {
+      "cached_tokens": 0
+    },
+    "output_tokens": 1018,
+    "output_tokens_details": {
+      "reasoning_tokens": 896
+    },
+    "total_tokens": 1059
+  },
+  "user": null,
+  "metadata": {}
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-26b9d2cc-120b-46d5-98f1-62c9e550bc20.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-26b9d2cc-120b-46d5-98f1-62c9e550bc20.json
new file mode 100644
index 00000000..4ec884cf
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-26b9d2cc-120b-46d5-98f1-62c9e550bc20.json
@@ -0,0 +1,89 @@
+{
+  "id": "resp_0a904223c9c2dec80069d6c297782481909fd8a34345c8c723",
+  "object": "response",
+  "created_at": 1775682199,
+  "status": "completed",
+  "background": false,
+  "billing": {
+    "payer": "developer"
+  },
+  "completed_at": 1775682215,
+  "error": null,
+  "frequency_penalty": 0.0,
+  "incomplete_details": null,
+  "instructions": null,
+  "max_output_tokens": null,
+  "max_tool_calls": null,
+  "model": "o4-mini-2025-04-16",
+  "output": [
+    {
+      "id": "rs_0a904223c9c2dec80069d6c297e9888190b6872d7c5acd1fef",
+      "type": "reasoning",
+      "summary": [
+        {
+          "type": "summary_text",
+          "text": "**Identifying the sequence pattern**\n\nThe user has shared a sequence: 2, 6, 12, 20, 30, and I\u2019m trying to find the pattern. It looks like these numbers are twice the triangular numbers, which are calculated as T_n = n(n+1)/2. So, the nth term can be expressed as a_n = n(n+1). For n starting at 1, this yields: a_1=2, a_2=6, a_3=12, and so forth. Following another line of reasoning, I realize the differences are also increasing consistently."
+        },
+        {
+          "type": "summary_text",
+          "text": "**Defining the pronic sequence**\n\nI\u2019ve been exploring the sequence 2, 6, 12, 20, 30 and calculating the differences between consecutive terms. I see that the differences follow the pattern d_n = 2n for n >= 2. This means each term can be represented as the sum of the previous term and that difference. Therefore, I identify the sequence as pronic numbers, which is expressed as a_n = n(n+1). Ultimately, this tells me that the nth term for n >= 1 is n(n+1)."
+        },
+        {
+          "type": "summary_text",
+          "text": "**Explaining the pronic numbers sequence**\n\nI need to clarify that if we start the sequence at n=1, then the formula for the nth term is a_n = n(n+1), which represents the product of successive integers, or pronic numbers. The differences between terms increase by 2, indicating a quadratic sequence. Therefore, I conclude that the pattern is 2, 6, 12, 20, 30, with the general formula being a_n = n^2 + n. If starting at n=0, it would shift to a_n = (n+1)(n+2)."
+        }
+      ]
+    },
+    {
+      "id": "msg_0a904223c9c2dec80069d6c2a75bec8190a04ffb44dd56eb6f",
+      "type": "message",
+      "status": "completed",
+      "content": [
+        {
+          "type": "output_text",
+          "annotations": [],
+          "logprobs": [],
+          "text": "The \u201cgaps\u201d between terms are  \n6\u20132=4, 12\u20136=6, 20\u201312=8, 30\u201320=10,\u2026  \nso the differences are 4, 6, 8, 10,\u2026 i.e. they increase by 2 each time.  A sequence with linearly growing differences is quadratic.  In fact one can check that\n\na\u2081=2, a\u2082=6, a\u2083=12 \u21d2 a\u2099=n\u00b2+n.\n\nEquivalently\n\na\u2099=n(n+1),  for n=1,2,3,\u2026\n\nwhich indeed gives 1\u00b72=2, 2\u00b73=6, 3\u00b74=12, 4\u00b75=20, 5\u00b76=30,\u2026"
+        }
+      ],
+      "role": "assistant"
+    }
+  ],
+  "parallel_tool_calls": true,
+  "presence_penalty": 0.0,
+  "previous_response_id": null,
+  "prompt_cache_key": null,
+  "prompt_cache_retention": null,
+  "reasoning": {
+    "effort": "high",
+    "summary": "detailed"
+  },
+  "safety_identifier": null,
+  "service_tier": "default",
+  "store": true,
+  "temperature": 1.0,
+  "text": {
+    "format": {
+      "type": "text"
+    },
+    "verbosity": "medium"
+  },
+  "tool_choice": "auto",
+  "tools": [],
+  "top_logprobs": 0,
+  "top_p": 1.0,
+  "truncation": "disabled",
+  "usage": {
+    "input_tokens": 41,
+    "input_tokens_details": {
+      "cached_tokens": 0
+    },
+    "output_tokens": 1767,
+    "output_tokens_details": {
+      "reasoning_tokens": 1536
+    },
+    "total_tokens": 1808
+  },
+  "user": null,
+  "metadata": {}
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-67d3cc54-67f9-484b-9700-f834b6645454.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-67d3cc54-67f9-484b-9700-f834b6645454.json
new file mode 100644
index 00000000..2baae3fe
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-67d3cc54-67f9-484b-9700-f834b6645454.json
@@ -0,0 +1,89 @@
+{
+  "id": "resp_077f768058f266c60069d6c2949d9c8195b237a4b3bb2b14c4",
+  "object": "response",
+  "created_at": 1775682196,
+  "status": "completed",
+  "background": false,
+  "billing": {
+    "payer": "developer"
+  },
+  "completed_at": 1775682212,
+  "error": null,
+  "frequency_penalty": 0.0,
+  "incomplete_details": null,
+  "instructions": null,
+  "max_output_tokens": null,
+  "max_tool_calls": null,
+  "model": "o4-mini-2025-04-16",
+  "output": [
+    {
+      "id": "rs_077f768058f266c60069d6c294fe7c81958f56dbbf226ff9a6",
+      "type": "reasoning",
+      "summary": [
+        {
+          "type": "summary_text",
+          "text": "**Identifying the sequence pattern**\n\nThe user has given me the sequence: 2, 6, 12, 20, 30, and they want to find the pattern. I see that it's related to the formula n(n+1). Checking this, I find that for n=1, it produces 2; for n=2, it gives 6; and so on. This indicates that the formula indeed works. Also, there's an alternative interpretation as triangular numbers multiplied by 2. The differences suggest a quadratic pattern, confirming that a_n = n(n+1) is correct."
+        },
+        {
+          "type": "summary_text",
+          "text": "**Explaining the pronic numbers**\n\nThe pattern here is about pronic numbers, which are produced by multiplying two consecutive integers. So, I can express this as a_n = n(n+1). This means the numbers 2, 6, 12, etc., are also twice the triangular numbers. I want to clarify that the differences between the terms increase by 2 each time, showing that it\u2019s a quadratic sequence. The nth term formula remains a_n = n(n+1), typically starting from n=1. Therefore, the answer is a_n = n^2 + n for n\u22651."
+        },
+        {
+          "type": "summary_text",
+          "text": "**Explaining the sequence pattern**\n\nThe user provided the sequence: 2, 6, 12, 20, 30, and asks for the pattern and nth term formula. I see that the differences increase by 2: +4, +6, +8, +10. This indicates it follows the pronic numbers, meaning the formula is a_n = n(n+1). To clarify, each term is a product of two consecutive integers. Thus, the final message should state: pattern: product of consecutive integers, formula: a_n = n(n+1). This captures the essence of the sequence!"
+        }
+      ]
+    },
+    {
+      "id": "msg_077f768058f266c60069d6c2a470988195bb350a791bfef4c7",
+      "type": "message",
+      "status": "completed",
+      "content": [
+        {
+          "type": "output_text",
+          "annotations": [],
+          "logprobs": [],
+          "text": "The pattern is that the differences go up by 2 each time:\n\n  6\u20132=4,  12\u20136=6,  20\u201312=8,  30\u201320=10, \u2026\n\nA quick way to see it\u2019s quadratic is to note the second differences are constant (2), so  \na\u2099=An\u00b2+Bn+C.  Plugging in n=1,2,3 gives A=1, B=1, C=0.\n\nEquivalently, each term is the product of two consecutive integers:\n\n  a\u2099 = n\u00b7(n+1).\n\nSo for n=1,2,3,4,5,\u2026 you get\n\n  a\u2081=1\u00b72=2,  a\u2082=2\u00b73=6,  a\u2083=3\u00b74=12,  a\u2084=4\u00b75=20,  a\u2085=5\u00b76=30, \u2026\n\nIn closed-form:  \n\n  a\u2099 = n\u00b2 + n = n(n+1)."
+        }
+      ],
+      "role": "assistant"
+    }
+  ],
+  "parallel_tool_calls": true,
+  "presence_penalty": 0.0,
+  "previous_response_id": null,
+  "prompt_cache_key": null,
+  "prompt_cache_retention": null,
+  "reasoning": {
+    "effort": "high",
+    "summary": "detailed"
+  },
+  "safety_identifier": null,
+  "service_tier": "default",
+  "store": true,
+  "temperature": 1.0,
+  "text": {
+    "format": {
+      "type": "text"
+    },
+    "verbosity": "medium"
+  },
+  "tool_choice": "auto",
+  "tools": [],
+  "top_logprobs": 0,
+  "top_p": 1.0,
+  "truncation": "disabled",
+  "usage": {
+    "input_tokens": 41,
+    "input_tokens_details": {
+      "cached_tokens": 0
+    },
+    "output_tokens": 1809,
+    "output_tokens_details": {
+      "reasoning_tokens": 1536
+    },
+    "total_tokens": 1850
+  },
+  "user": null,
+  "metadata": {}
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-7c89b40f-1c4f-42b1-be76-7a4c43f4c667.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-7c89b40f-1c4f-42b1-be76-7a4c43f4c667.json
new file mode 100644
index 00000000..4c171744
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-7c89b40f-1c4f-42b1-be76-7a4c43f4c667.json
@@ -0,0 +1,85 @@
+{
+  "id": "resp_0a904223c9c2dec80069d6c2a86db08190a15974270cee7c24",
+  "object": "response",
+  "created_at": 1775682216,
+  "status": "completed",
+  "background": false,
+  "billing": {
+    "payer": "developer"
+  },
+  "completed_at": 1775682224,
+  "error": null,
+  "frequency_penalty": 0.0,
+  "incomplete_details": null,
+  "instructions": null,
+  "max_output_tokens": null,
+  "max_tool_calls": null,
+  "model": "o4-mini-2025-04-16",
+  "output": [
+    {
+      "id": "rs_0a904223c9c2dec80069d6c2a8f4f88190a1206bee8f92d110",
+      "type": "reasoning",
+      "summary": [
+        {
+          "type": "summary_text",
+          "text": "**Calculating term and sum**\n\nThe user is asking for the 10th term from the sequence defined by a_n = n(n+1). To find this, I calculate a_10, which is 10*11, giving me 110. Next, for the sum of the first 10 terms, I use the formula for n^2 and n. The sum of n^2 from 1 to 10 is 385, and the sum of n is 55. Adding these together gives a total of 440. So, I conclude that the 10th term is 110 and the sum is 440."
+        },
+        {
+          "type": "summary_text",
+          "text": "**Summarizing the calculations**\n\nI want to include the formulas for clarity. The 10th term is a_10, which equals 110, and the sum of the first 10 terms is 440. There's a neat formula for this sum: the sum of a_n = sum_{n=1}^N n(n+1) = N(N+1)(N+2)/3. For N=10, it checks out as 10*11*12/3 = 440. I can mention this sum formula as part of my response. So, to summarize: the answers are 110 for the term and 440 for the sum."
+        }
+      ]
+    },
+    {
+      "id": "msg_0a904223c9c2dec80069d6c2b05f8881909bd0fb55c2a56fd6",
+      "type": "message",
+      "status": "completed",
+      "content": [
+        {
+          "type": "output_text",
+          "annotations": [],
+          "logprobs": [],
+          "text": "The nth term is a\u2099 = n(n+1).  \nSo for n=10:  \na\u2081\u2080 = 10\u00b711 = 110.  \n\nThe sum of the first 10 terms is  \nS\u2081\u2080 = \u2211\u2099\u208c\u2081\u00b9\u2070 n(n+1) = \u2211n\u00b2 + \u2211n  \n   = (10\u00b711\u00b721)/6 + (10\u00b711)/2  \n   = 385 + 55  \n   = 440.  \n\nEquivalently you can use the closed\u2010form  \n\u2211\u2099\u208c\u2081\u1d3a n(n+1) = N(N+1)(N+2)/3,  \nso for N=10: 10\u00b711\u00b712/3 = 440."
+        }
+      ],
+      "role": "assistant"
+    }
+  ],
+  "parallel_tool_calls": true,
+  "presence_penalty": 0.0,
+  "previous_response_id": null,
+  "prompt_cache_key": null,
+  "prompt_cache_retention": null,
+  "reasoning": {
+    "effort": "high",
+    "summary": "detailed"
+  },
+  "safety_identifier": null,
+  "service_tier": "default",
+  "store": true,
+  "temperature": 1.0,
+  "text": {
+    "format": {
+      "type": "text"
+    },
+    "verbosity": "medium"
+  },
+  "tool_choice": "auto",
+  "tools": [],
+  "top_logprobs": 0,
+  "top_p": 1.0,
+  "truncation": "disabled",
+  "usage": {
+    "input_tokens": 246,
+    "input_tokens_details": {
+      "cached_tokens": 0
+    },
+    "output_tokens": 612,
+    "output_tokens_details": {
+      "reasoning_tokens": 384
+    },
+    "total_tokens": 858
+  },
+  "user": null,
+  "metadata": {}
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-67a1eb69-9269-491a-8e9d-f7361e6e4b26.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-7cde4bf4-897d-40ce-993c-976598baeaef.json
similarity index 81%
rename from test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-67a1eb69-9269-491a-8e9d-f7361e6e4b26.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-7cde4bf4-897d-40ce-993c-976598baeaef.json
index c3442735..6ac23148 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-67a1eb69-9269-491a-8e9d-f7361e6e4b26.json
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-7cde4bf4-897d-40ce-993c-976598baeaef.json
@@ -1,13 +1,13 @@
 {
-  "id": "resp_05c66fce3eb079e70069a8941be3548190bf09e72c2c39e36a",
+  "id": "resp_08dcf87bcfc003920069d6c34e9a9c8197b2e2dc382b17ae71",
   "object": "response",
-  "created_at": 1772655643,
+  "created_at": 1775682382,
   "status": "completed",
   "background": false,
   "billing": {
     "payer": "developer"
   },
-  "completed_at": 1772655646,
+  "completed_at": 1775682383,
   "error": null,
   "frequency_penalty": 0.0,
   "incomplete_details": null,
@@ -17,12 +17,12 @@
   "model": "o4-mini-2025-04-16",
   "output": [
     {
-      "id": "rs_05c66fce3eb079e70069a8941d81508190b833633fcf8fe167",
+      "id": "rs_08dcf87bcfc003920069d6c34efae48197977951c88c1a1333",
       "type": "reasoning",
       "summary": []
     },
     {
-      "id": "msg_05c66fce3eb079e70069a8941e1fe48190812c6e682955fe87",
+      "id": "msg_08dcf87bcfc003920069d6c34fa4d08197a89f1de6df1eef06",
       "type": "message",
       "status": "completed",
       "content": [
@@ -65,11 +65,11 @@
     "input_tokens_details": {
       "cached_tokens": 0
     },
-    "output_tokens": 28,
+    "output_tokens": 36,
     "output_tokens_details": {
       "reasoning_tokens": 0
     },
-    "total_tokens": 46
+    "total_tokens": 54
   },
   "user": null,
   "metadata": {}
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-d601536c-c724-406b-b517-78acf9766f8f.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-d601536c-c724-406b-b517-78acf9766f8f.json
deleted file mode 100644
index 5b76803c..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-d601536c-c724-406b-b517-78acf9766f8f.json
+++ /dev/null
@@ -1,76 +0,0 @@
-{
-  "id": "resp_0e493f7efce61bc40069a9ccf5dec88190af368675ae1b2ad3",
-  "object": "response",
-  "created_at": 1772735733,
-  "status": "completed",
-  "background": false,
-  "billing": {
-    "payer": "developer"
-  },
-  "completed_at": 1772735735,
-  "error": null,
-  "frequency_penalty": 0.0,
-  "incomplete_details": null,
-  "instructions": null,
-  "max_output_tokens": null,
-  "max_tool_calls": null,
-  "model": "o4-mini-2025-04-16",
-  "output": [
-    {
-      "id": "rs_0e493f7efce61bc40069a9ccf6835c8190bffce8a6e0eddb64",
-      "type": "reasoning",
-      "summary": []
-    },
-    {
-      "id": "msg_0e493f7efce61bc40069a9ccf6fd548190be284508bdf0ac0c",
-      "type": "message",
-      "status": "completed",
-      "content": [
-        {
-          "type": "output_text",
-          "annotations": [],
-          "logprobs": [],
-          "text": "Paris"
-        }
-      ],
-      "role": "assistant"
-    }
-  ],
-  "parallel_tool_calls": true,
-  "presence_penalty": 0.0,
-  "previous_response_id": null,
-  "prompt_cache_key": null,
-  "prompt_cache_retention": null,
-  "reasoning": {
-    "effort": "low",
-    "summary": "detailed"
-  },
-  "safety_identifier": null,
-  "service_tier": "default",
-  "store": true,
-  "temperature": 1.0,
-  "text": {
-    "format": {
-      "type": "text"
-    },
-    "verbosity": "medium"
-  },
-  "tool_choice": "auto",
-  "tools": [],
-  "top_logprobs": 0,
-  "top_p": 1.0,
-  "truncation": "disabled",
-  "usage": {
-    "input_tokens": 18,
-    "input_tokens_details": {
-      "cached_tokens": 0
-    },
-    "output_tokens": 30,
-    "output_tokens_details": {
-      "reasoning_tokens": 0
-    },
-    "total_tokens": 48
-  },
-  "user": null,
-  "metadata": {}
-}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-e1b95ee2-2a32-4751-8af6-800593e885dd.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-e1b95ee2-2a32-4751-8af6-800593e885dd.json
new file mode 100644
index 00000000..96c83864
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-e1b95ee2-2a32-4751-8af6-800593e885dd.json
@@ -0,0 +1,85 @@
+{
+  "id": "resp_057e67b8f6bc5bec0069d6c2947dd0819689a86bde4c0029f6",
+  "object": "response",
+  "created_at": 1775682196,
+  "status": "completed",
+  "background": false,
+  "billing": {
+    "payer": "developer"
+  },
+  "completed_at": 1775682207,
+  "error": null,
+  "frequency_penalty": 0.0,
+  "incomplete_details": null,
+  "instructions": null,
+  "max_output_tokens": null,
+  "max_tool_calls": null,
+  "model": "o4-mini-2025-04-16",
+  "output": [
+    {
+      "id": "rs_057e67b8f6bc5bec0069d6c294db08819690fffb2a590f15de",
+      "type": "reasoning",
+      "summary": [
+        {
+          "type": "summary_text",
+          "text": "**Calculating sum formulas**\n\nThe user has a formula \\( a_n = n(n+1) \\) and is looking to find \\( a_{10} \\), which is \\( 10 \\times 11 = 110 \\). Next, I need to compute \\( S_{10} = \\sum_{n=1}^{10} n(n+1) \\). This simplifies to finding the sums of \\( n^2 \\) and \\( n \\). \n\nAfter calculating, I find that \\( S_{10} = 440 \\). The derived general formula for this sum is \\( \\sum_{k=1}^{n} k(k+1) = \\frac{n(n+1)(n+2)}{3} \\). So, the answers are \\( a_{10} = 110 \\) and the sum equals 440."
+        },
+        {
+          "type": "summary_text",
+          "text": "**Summarizing values and formulas**\n\nI can provide clear answers now: the term \\( a_{10} = 10 \\times 11 = 110 \\). Next, to find the sum \\( S_{10} = \\sum_{n=1}^{10} n(n+1) \\), I can use the formula \\( S_n = \\frac{n(n+1)(n+2)}{3} \\), which gives me \\( \\frac{10 \\times 11 \\times 12}{3} = 440 \\). So, the results are \\( a_{10} = 110 \\) and \\( S_{10} = 440 \\). Let's finalize this presentation!"
+        }
+      ]
+    },
+    {
+      "id": "msg_057e67b8f6bc5bec0069d6c29e93348196ad85685abd20a1a5",
+      "type": "message",
+      "status": "completed",
+      "content": [
+        {
+          "type": "output_text",
+          "annotations": [],
+          "logprobs": [],
+          "text": "The 10th term is  \n\u2002a\u2081\u2080 = 10\u00b7(10 + 1) = 10\u00b711 = 110.  \n\nThe sum of the first 10 terms is  \n\u2002S\u2081\u2080 = \u2211_{k=1}^{10} k(k+1)  \n\u2002\u2002\u2002= \u2211k\u00b2 + \u2211k  \n\u2002\u2002\u2002= (10\u00b711\u00b721)/6 + (10\u00b711)/2  \n\u2002\u2002\u2002= 385 + 55  \n\u2002\u2002\u2002= 440.  \n\nEquivalently one can use the closed\u2010form  \n\u2002S\u2099 = n(n+1)(n+2)/3  \nso  \n\u2002S\u2081\u2080 = 10\u00b711\u00b712/3 = 440."
+        }
+      ],
+      "role": "assistant"
+    }
+  ],
+  "parallel_tool_calls": true,
+  "presence_penalty": 0.0,
+  "previous_response_id": null,
+  "prompt_cache_key": null,
+  "prompt_cache_retention": null,
+  "reasoning": {
+    "effort": "high",
+    "summary": "detailed"
+  },
+  "safety_identifier": null,
+  "service_tier": "default",
+  "store": true,
+  "temperature": 1.0,
+  "text": {
+    "format": {
+      "type": "text"
+    },
+    "verbosity": "medium"
+  },
+  "tool_choice": "auto",
+  "tools": [],
+  "top_logprobs": 0,
+  "top_p": 1.0,
+  "truncation": "disabled",
+  "usage": {
+    "input_tokens": 173,
+    "input_tokens_details": {
+      "cached_tokens": 0
+    },
+    "output_tokens": 715,
+    "output_tokens_details": {
+      "reasoning_tokens": 512
+    },
+    "total_tokens": 888
+  },
+  "user": null,
+  "metadata": {}
+}
\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-fb26b741-b06e-4a90-8bbe-b43a48b00c78.json b/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-fb26b741-b06e-4a90-8bbe-b43a48b00c78.json
deleted file mode 100644
index d30c82f0..00000000
--- a/test-harness/src/testFixtures/resources/cassettes/openai/__files/responses-fb26b741-b06e-4a90-8bbe-b43a48b00c78.json
+++ /dev/null
@@ -1,76 +0,0 @@
-{
-  "id": "resp_09eb8e80298c55280069a9c179ca848195a885ce649cc1adc4",
-  "object": "response",
-  "created_at": 1772732793,
-  "status": "completed",
-  "background": false,
-  "billing": {
-    "payer": "developer"
-  },
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new file mode 100644
index 00000000..df875b4d
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rename from test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-d09661be-dc30-4efd-a105-849e05b49ef6.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-7156e61f-ed66-492c-86b1-bf2008a1d56b.json
index d6adbeff..b11ff296 100644
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deleted file mode 100644
index 553e88c6..00000000
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+++ /dev/null
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diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-c05d239e-fcb5-45ff-9ff1-2c4fe5a1dcdf.json b/test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-c05d239e-fcb5-45ff-9ff1-2c4fe5a1dcdf.json
new file mode 100644
index 00000000..964ae861
--- /dev/null
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-c05d239e-fcb5-45ff-9ff1-2c4fe5a1dcdf.json
@@ -0,0 +1,52 @@
+{
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+      "ignoreArrayOrder" : true,
+      "ignoreExtraElements" : false
+    } ]
+  },
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\ No newline at end of file
diff --git a/test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-66ebfe33-532e-4d37-9eef-f52073d3852b.json b/test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-d14e2e70-8bd9-4b59-9276-ba6ff15e1b75.json
similarity index 65%
rename from test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-66ebfe33-532e-4d37-9eef-f52073d3852b.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-d14e2e70-8bd9-4b59-9276-ba6ff15e1b75.json
index 54d2c266..ac7bb036 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-66ebfe33-532e-4d37-9eef-f52073d3852b.json
+++ b/test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-d14e2e70-8bd9-4b59-9276-ba6ff15e1b75.json
@@ -1,5 +1,5 @@
 {
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similarity index 62%
rename from test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-8306fcb1-24bb-4510-8a32-dddb526d55e3.json
rename to test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-d22462cb-f90a-487c-854a-5eb7eefb6ec6.json
index cbc19d29..02928c5f 100644
--- a/test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-8306fcb1-24bb-4510-8a32-dddb526d55e3.json
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@@ -1,5 +1,5 @@
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deleted file mode 100644
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deleted file mode 100644
index 9e36f03f..00000000
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new file mode 100644
index 00000000..258d4339
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new file mode 100644
index 00000000..cd15a40c
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similarity index 57%
rename from test-harness/src/testFixtures/resources/cassettes/openai/mappings/chat_completions-8edce6d1-4c7f-404e-bd3d-031116dba7bf.json
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new file mode 100644
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new file mode 100644
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