Add release commit collection to workflow

.github/workflows/release.yml

@@ -121,6 +121,54 @@ jobs:
           echo "version=$NEW_VERSION" >> $GITHUB_OUTPUT
           echo "✅ Version updated: ${{ steps.current_version.outputs.version }} → $NEW_VERSION"
 
+      - name: Collect release commits
+        id: release_commits
+        env:
+          GH_TOKEN: ${{ steps.app-token.outputs.token }}
+          REPO: ${{ github.repository }}
+          PREV_VERSION: ${{ steps.current_version.outputs.version }}
+        run: |
+          PREV_TAG="v${PREV_VERSION}"
+          if git rev-parse "$PREV_TAG" >/dev/null 2>&1; then
+            RANGE="$PREV_TAG..HEAD"
+          else
+            RANGE="HEAD"
+            echo "Previous tag $PREV_TAG not found; using full history."
+          fi
+
+          COMMITS=$(git log --pretty=format:'%H|%h|%s' "$RANGE")
+          if [ -z "$COMMITS" ]; then
+            {
+              echo "markdown<<EOF"
+              echo "- No new commits found."
+              echo "EOF"
+            } >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          NOTES_FILE=$(mktemp)
+          while IFS='|' read -r COMMIT_SHA COMMIT_SHORT COMMIT_SUBJECT; do
+            PR_JSON=$(curl -sS \
+              -H "Authorization: Bearer $GH_TOKEN" \
+              -H "Accept: application/vnd.github+json" \
+              "https://api.github.com/repos/$REPO/commits/$COMMIT_SHA/pulls" || echo "[]")
+
+            PR_NUMBER=$(echo "$PR_JSON" | jq -r '.[0].number // empty')
+            PR_URL=$(echo "$PR_JSON" | jq -r '.[0].html_url // empty')
+
+            if [ -n "$PR_NUMBER" ] && [ -n "$PR_URL" ]; then
+              echo "- [\`$COMMIT_SHORT\`](https://github.com/$REPO/commit/$COMMIT_SHA) $COMMIT_SUBJECT ([#${PR_NUMBER}]($PR_URL))" >> "$NOTES_FILE"
+            else
+              echo "- [\`$COMMIT_SHORT\`](https://github.com/$REPO/commit/$COMMIT_SHA) $COMMIT_SUBJECT" >> "$NOTES_FILE"
+            fi
+          done <<< "$COMMITS"
+
+          {
+            echo "markdown<<EOF"
+            cat "$NOTES_FILE"
+            echo "EOF"
+          } >> "$GITHUB_OUTPUT"
+
       - name: Build package
         run: |
           echo "🔄 Building package..."
@@ -198,6 +246,9 @@ jobs:
           echo "- **Target**: PyPI" >> $GITHUB_STEP_SUMMARY
           echo "- **Dry Run**: ${{ inputs.dry_run }}" >> $GITHUB_STEP_SUMMARY
           echo "" >> $GITHUB_STEP_SUMMARY
+          echo "### 🧾 New Commits" >> $GITHUB_STEP_SUMMARY
+          printf '%s\n' "${{ steps.release_commits.outputs.markdown }}" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
 
           if [ "${{ inputs.dry_run }}" = "false" ]; then
             echo "### 📦 Package Links" >> $GITHUB_STEP_SUMMARY