pr-design-doc
For a non-trivial pull request, write a self-contained HTML design doc under the temporary `.pr/` directory and link a visibility-appropriate preview in the PR description, so maintainers grasp the proposal at a glance - code/API design, and the before/after of the change, grounded to real code. Use when opening or updating a non-trivial PR, or when the user says "add a design doc", "document this PR for reviewers", "show the before/after", "make the design reviewable", or "write the .pr/ page".
SKILL.md
The description above is the indexed summary. With JavaScript enabled, this page also loads the SKILL.md text from GitHub.