## Summary

## Validation

- [ ] `python3 scripts/validate_skill_inventory.py`
- [ ] `python3 scripts/reference_freshness.py resources/references --max-age-days 90`
- [ ] Relevant script or installer command:

## Checklist

- [ ] I kept inventory counts and README/SKILL references in sync.
- [ ] I added or updated freshness markers for changed reference files.
- [ ] I did not include secrets, credentials, or generated audit outputs.