diff --git a/.github/workflows/update-manifest.yml b/.github/workflows/update-manifest.yml
new file mode 100644
index 0000000..7a6292b
--- /dev/null
+++ b/.github/workflows/update-manifest.yml
@@ -0,0 +1,182 @@
+name: Update manifest.json on release
+
+on:
+  release:
+    types: [published, edited, deleted]
+
+permissions:
+  contents: write
+
+concurrency:
+  group: update-manifest
+  cancel-in-progress: false
+
+jobs:
+  update-manifest:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.repository.default_branch }}
+
+      - name: Extract version from release tag
+        id: version
+        run: |
+          TAG="${{ github.event.release.tag_name }}"
+          # Strip leading 'v' if present
+          VERSION="${TAG#v}"
+          # Ensure four-part version (append .0 if needed)
+          DOTS=$(echo "$VERSION" | tr -cd '.' | wc -c | tr -d ' ')
+          if [ "$DOTS" -eq 2 ]; then
+            VERSION="${VERSION}.0"
+          fi
+          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+          echo "Version: $VERSION"
+
+      # ── Delete: remove the version entry ──────────────────────────────
+
+      - name: Remove version from manifest.json
+        if: github.event.action == 'deleted'
+        run: |
+          jq --arg ver "${{ steps.version.outputs.version }}" \
+             '.[0].versions |= map(select(.version != $ver))' \
+             manifest.json > manifest.tmp && mv manifest.tmp manifest.json
+
+          echo "Removed version ${{ steps.version.outputs.version }} from manifest.json"
+
+      # ── Published / Edited: upsert the version entry ──────────────────
+
+      - name: Extract targetAbi from .csproj
+        if: github.event.action != 'deleted'
+        id: abi
+        run: |
+          ABI=$(grep -oP 'Jellyfin\.Controller"[^>]*Version="\K[^"]+' backend/Moonfin.Server.csproj)
+          echo "targetAbi=${ABI}.0" >> "$GITHUB_OUTPUT"
+          echo "Target ABI: ${ABI}.0"
+
+      - name: Download release zip asset
+        if: github.event.action != 'deleted'
+        id: asset
+        env:
+          GH_TOKEN: ${{ github.token }}
+          RELEASE_ASSETS: ${{ toJSON(github.event.release.assets) }}
+        run: |
+          ASSET_URL=$(echo "$RELEASE_ASSETS" | jq -r '.[] | select(.name | startswith("Moonfin.Server-") and endswith(".zip")) | .browser_download_url' | head -1)
+
+          if [ -z "$ASSET_URL" ]; then
+            echo "::error::No Moonfin.Server-*.zip asset found on this release"
+            exit 1
+          fi
+
+          ASSET_NAME=$(basename "$ASSET_URL")
+          echo "Downloading $ASSET_NAME from $ASSET_URL"
+          curl -fSL -o "$ASSET_NAME" "$ASSET_URL"
+
+          echo "asset_name=$ASSET_NAME" >> "$GITHUB_OUTPUT"
+          echo "source_url=$ASSET_URL" >> "$GITHUB_OUTPUT"
+
+      - name: Compute MD5 checksum
+        if: github.event.action != 'deleted'
+        id: checksum
+        run: |
+          CHECKSUM=$(md5sum "${{ steps.asset.outputs.asset_name }}" | awk '{print toupper($1)}')
+          echo "checksum=$CHECKSUM" >> "$GITHUB_OUTPUT"
+          echo "MD5: $CHECKSUM"
+
+      - name: Format timestamp
+        if: github.event.action != 'deleted'
+        id: timestamp
+        env:
+          RELEASE_CREATED_AT: ${{ github.event.release.created_at }}
+        run: |
+          TIMESTAMP=$(date -u -d "$RELEASE_CREATED_AT" +"%Y-%m-%dT%H:%M:%S")
+          echo "timestamp=$TIMESTAMP" >> "$GITHUB_OUTPUT"
+          echo "Timestamp: $TIMESTAMP"
+
+      - name: Sanitize changelog
+        if: github.event.action != 'deleted'
+        id: changelog
+        env:
+          RELEASE_BODY: ${{ github.event.release.body }}
+        run: |
+          # Write release body to file to preserve multi-line content
+          printf '%s' "$RELEASE_BODY" > /tmp/raw_changelog.txt
+
+          # Convert markdown release body to clean plain text for Jellyfin manifest:
+          #   1. Strip carriage returns
+          #   2. Remove badge images: [![alt](img)](url)
+          #   3. Remove inline images: ![alt](url)
+          #   4. Convert links to text: [text](url) → text
+          #   5. Strip bold markers: **text** → text
+          #   6. Strip inline code: `text` → text
+          #   7. Strip header prefixes: ## Title → Title
+          #   8. Remove horizontal rules: ---
+          #   9. Trim trailing whitespace
+          #  10. Remove leading/trailing blank lines
+          #  11. Collapse consecutive blank lines
+          sed -i 's/\r$//' /tmp/raw_changelog.txt
+          cat /tmp/raw_changelog.txt \
+            | sed -E 's/\[!\[[^]]*\]\([^)]*\)\]\([^)]*\)//g' \
+            | sed -E 's/!\[[^]]*\]\([^)]*\)//g' \
+            | sed -E 's/\[([^]]*)\]\([^)]*\)/\1/g' \
+            | sed -E 's/\*\*([^*]*)\*\*/\1/g' \
+            | sed -E 's/`([^`]*)`/\1/g' \
+            | sed -E 's/^#{1,6} +//' \
+            | sed -E 's/[[:space:]]+$//' \
+            | sed -E '/^---$/d' \
+            | sed -E '/^$/N;/^\n$/d' \
+            | sed '/./,$!d' \
+            > /tmp/changelog.txt
+
+          echo "Sanitized changelog:"
+          cat /tmp/changelog.txt
+
+      - name: Upsert version in manifest.json
+        if: github.event.action != 'deleted'
+        run: |
+          CHANGELOG=$(cat /tmp/changelog.txt)
+
+          jq --arg ver "${{ steps.version.outputs.version }}" \
+             --arg abi "${{ steps.abi.outputs.targetAbi }}" \
+             --arg url "${{ steps.asset.outputs.source_url }}" \
+             --arg sum "${{ steps.checksum.outputs.checksum }}" \
+             --arg time "${{ steps.timestamp.outputs.timestamp }}" \
+             --arg log "$CHANGELOG" \
+             '.[0].versions |= (
+                map(select(.version != $ver)) |
+                [{
+                  version: $ver,
+                  changelog: $log,
+                  targetAbi: $abi,
+                  sourceUrl: $url,
+                  checksum: $sum,
+                  timestamp: $time,
+                  dependencies: []
+                }] + .
+              )' \
+             manifest.json > manifest.tmp && mv manifest.tmp manifest.json
+
+          echo "Upserted version ${{ steps.version.outputs.version }} in manifest.json"
+
+      # ── Commit ────────────────────────────────────────────────────────
+
+      - name: Commit and push
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add manifest.json
+
+          ACTION="${{ github.event.action }}"
+          VERSION="${{ steps.version.outputs.version }}"
+
+          if [ "$ACTION" = "deleted" ]; then
+            MSG="chore: remove v${VERSION} from manifest.json"
+          else
+            MSG="chore: update manifest.json for v${VERSION}"
+          fi
+
+          git diff --cached --quiet && echo "No changes to commit" && exit 0
+          git commit -m "$MSG"
+          git pull --rebase
+          git push