## Summary
- trigger the Claude rebase workflow on PR close events
- add a per-PR concurrency group so a close/merge event cancels any
in-progress rebase run
- restrict the rebase job itself to labeled events so closed PRs only
trigger cancellation

## Test plan
- npm run fmt
- npm run lint:fix
- npm run ts
- npm test

#skip-bugbot

🤖 Generated with [Claude Code](https://claude.com/claude-code)
<!-- devin-review-badge-begin -->

---

<a href="https://app.devin.ai/review/dyad-sh/dyad/pull/2915"
target="_blank">
  <picture>
<source media="(prefers-color-scheme: dark)"
srcset="https://static.devin.ai/assets/gh-open-in-devin-review-dark.svg?v=1">
<img
src="https://static.devin.ai/assets/gh-open-in-devin-review-light.svg?v=1"
alt="Open with Devin">
  </picture>
</a>
<!-- devin-review-badge-end -->