Support Claude-written changelogs in tag annotations

Workflow now checks for annotated tags and uses the annotation
as release notes. If no annotation exists, falls back to GitHub's
auto-generation.

This allows Claude to write formatted release notes when creating
releases, stored directly in git history as part of the tag.

.github/workflows/release.yml

@@ -312,9 +312,21 @@ jobs:
           GH_TOKEN: ${{ github.token }}
         run: |
           TAG="${{ needs.extract-version.outputs.tag }}"
+          VERSION="${{ needs.extract-version.outputs.version }}"
 
           echo "Generating release notes for ${TAG}..."
 
+          # Check if tag has an annotation (release notes from Claude)
+          TAG_MESSAGE=$(git tag -l --format='%(contents)' "${TAG}")
+
+          NOTES_FILE=$(mktemp)
+
+          if [ -n "$TAG_MESSAGE" ] && [ "$TAG_MESSAGE" != "" ]; then
+            echo "Using release notes from tag annotation"
+            echo "$TAG_MESSAGE" > "$NOTES_FILE"
+          else
+            echo "No tag annotation found, generating release notes from commits..."
+
             # Get previous tag
             PREV_TAG=$(git tag --sort=-version:refname | grep -A1 "^${TAG}$" | tail -1)
 
@@ -336,13 +348,10 @@ jobs:
 
             # Extract the generated body
             GENERATED_NOTES=$(echo "$NOTES_JSON" | jq -r '.body')
-
-          # Save to file for the release
-          NOTES_FILE=$(mktemp)
             echo "$GENERATED_NOTES" > "$NOTES_FILE"
+          fi
 
           # Add installation instructions
-          VERSION="${{ needs.extract-version.outputs.version }}"
           cat >> "$NOTES_FILE" << EOF
 
 ## Installation