- Update PR template to include canvas extension as a contribution type
- Add 'canvas-extension' label (color: E4B9FF) to label-pr-intent workflow
with auto-detection for PRs touching extensions/**
- Add new validate-canvas-extensions.yml workflow that checks:
- extension.mjs is present in each changed extension folder
- assets/preview.png screenshot is present in each changed extension folder
- Posts a REQUEST_CHANGES review with a fix guide on failure
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Aaron Powell