diff --git a/package.json b/package.json
index 398528e..4df8223 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
     "name": "sustn",
     "private": true,
-    "version": "0.4.0",
+    "version": "0.5.0",
     "type": "module",
     "scripts": {
         "vite:dev": "vite",
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index c806da8..9342f8b 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -1,7 +1,7 @@
 {
     "$schema": "https://schema.tauri.app/config/2",
     "productName": "SUSTN",
-    "version": "0.4.0",
+    "version": "0.5.0",
     "identifier": "app.sustn.desktop",
     "build": {
         "beforeDevCommand": "pnpm vite:dev",
diff --git a/src-tauri/tauri.dev.conf.json b/src-tauri/tauri.dev.conf.json
index 71d934e..3443fa3 100644
--- a/src-tauri/tauri.dev.conf.json
+++ b/src-tauri/tauri.dev.conf.json
@@ -1,7 +1,7 @@
 {
     "$schema": "https://schema.tauri.app/config/2",
     "productName": "SUSTN Dev",
-    "version": "0.4.0",
+    "version": "0.5.0",
     "identifier": "app.sustn.desktop.dev",
     "build": {
         "beforeDevCommand": "pnpm vite:dev",
diff --git a/src-tauri/tauri.qa.conf.json b/src-tauri/tauri.qa.conf.json
index 03d5634..6fe2596 100644
--- a/src-tauri/tauri.qa.conf.json
+++ b/src-tauri/tauri.qa.conf.json
@@ -1,7 +1,7 @@
 {
     "$schema": "https://schema.tauri.app/config/2",
     "productName": "SUSTN QA",
-    "version": "0.4.0",
+    "version": "0.5.0",
     "identifier": "app.sustn.desktop.qa",
     "build": {
         "beforeDevCommand": "pnpm vite:dev",
diff --git a/web/app/changelog/data.ts b/web/app/changelog/data.ts
index 44ad3b0..979e63d 100644
--- a/web/app/changelog/data.ts
+++ b/web/app/changelog/data.ts
@@ -15,6 +15,34 @@ export interface ChangelogEntry {
 }
 
 export const changelog: ChangelogEntry[] = [
+    {
+        version: "0.5.0",
+        date: "Apr 3rd, 2026",
+        title: "PR Lifecycle & Auto-Reply",
+        description:
+            "Full pull request lifecycle management with GitHub comment sync, inline review threads in the diff viewer, and automatic AI replies to PR conversations.",
+        image: {
+            src: "/changelog/0.5.0-pr-lifecycle.png",
+            alt: "PR review with inline comments and conversation threads",
+        },
+        features: [
+            "PR lifecycle management — track PRs from creation through review, addressing feedback, and merge, with real-time status in the activity timeline",
+            "GitHub PR comments in diff viewer — review comments from GitHub are displayed inline alongside the code diff for full context",
+            "Auto-reply for PR comments — SUSTN automatically responds to conversational PR comments using a unified Claude session, with a per-repo toggle to enable or disable",
+            "React error boundaries — component-level crash isolation prevents a single UI failure from taking down the entire app",
+        ],
+        improvements: [
+            "Replaced heuristic comment classifier with a unified Claude session for more accurate review vs. conversational comment handling",
+            "Compact single-card design for PR review comment threads with tighter spacing",
+            "PR lifecycle events now render in the activity timeline with clear status indicators",
+        ],
+        fixes: [
+            "Fixed `null` `comment_id` in Claude review responses causing failed comment syncs",
+            "Fixed comment classification so conversational comments are processed without requiring a formal review cycle",
+            "PR comments now always sync correctly — removed stale filter that was hiding the bot's own replies",
+            "Bypassed worker queue for `engine_address_review` to call Claude directly, preventing stuck addressing state",
+        ],
+    },
     {
         version: "0.4.0",
         date: "Mar 26th, 2026",
diff --git a/web/public/changelog/0.5.0-pr-lifecycle.png b/web/public/changelog/0.5.0-pr-lifecycle.png
new file mode 100644
index 0000000..cb02869
Binary files /dev/null and b/web/public/changelog/0.5.0-pr-lifecycle.png differ