## What changed

<!-- Keep this focused. One resource or one maintenance concern per pull request is preferred. -->

## Source and verification

- Canonical source:
- Last verified (YYYY-MM-DD):
- License or redistribution terms, if adding a file:

## Checklist

- [ ] I searched for duplicate resources and issues.
- [ ] New links open without requiring an account.
- [ ] Local paths match file names exactly.
- [ ] The description is factual and concise.
- [ ] The resource is current or clearly marked as historical.
- [ ] I verified the accuracy of any AI-assisted content.