## Summary

Describe the change and the package, app, or workflow it belongs to.

## Proof

List the commands, tests, benchmarks, screenshots, or generated artifacts that
prove the change.

- [ ] Focused checks run
- [ ] `pnpm lint`
- [ ] `pnpm run ci` or a narrower justified gate

## Risk

Call out compatibility, formula semantics, persistence, benchmark, browser,
sync, or agent-runtime risks.

## Notes

Link issues, docs, benchmark artifacts, or follow-up work.

For public docs or example work, include the page or discussion that a new
visitor should use after the merge.
