## What this changes

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## Checklist (see [CONTRIBUTING.md](../CONTRIBUTING.md))

- [ ] Date-sensitive claims are anchored to a version (`v2.1.x`) or full date, with a source link
- [ ] Renamed/removed headings keep an `<a id="old-slug"></a>` compatibility anchor
- [ ] New skills are tested locally (`claude` → `/your-skill`) and documented in `docs/skills.md`
- [ ] Tables used over walls of bullets; no marketing language