Use this skill to run a structured pre-submit checklist on a change before it goes out for review, helping the author catch everything catchable before a reviewer ever looks. Activate when a user is about to open or push a pull request, is getting ready to submit or merge changes, wants to know whether their PR is ready, asks for a pre-submit or pre-flight check, or describes a change and asks whether anything is missing before requesting review. Do not use this skill for writing or improving a PR title and description (use pr-best-practices for that), reviewing someone else's code (use pr-review for that), or running automated tests or linters directly on behalf of the u…