writing-github-issue-and-pr-markdown

Use whenever directly drafting, writing, or editing the exact Markdown source of a GitHub Issue or pull-request body, conversation comment, submitted-review body, review-thread root, or review-thread reply, including edits to selected spans of an existing body. For a complete pull-request title and navigable description, use writing-reviewable-pr-descriptions, which consumes this contract. Do not use for repository Markdown files, read-only inspection, posting unchanged text, reactions, thread resolution, review submission, or other GitHub actuation.