Clean up outdated review comments before new review

.github/workflows/claude-code.yml

@@ -62,6 +62,15 @@ jobs:
           role-to-assume: ${{ secrets.AWS_ROLE_TO_ASSUME }}
           aws-region: us-east-1
 
+      - name: Clean up outdated review comments
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          # Delete all previous review comments from github-actions bot
+          gh api repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}/comments \
+            --jq '.[] | select(.user.login == "github-actions[bot]") | .id' | \
+            xargs -I {} gh api repos/${{ github.repository }}/pulls/comments/{} -X DELETE 2>/dev/null || true
+
       - name: Run Claude Code PR Review
         uses: anthropics/claude-code-action@v1
         with: