Reviews a change against its intent — layered review from requirements down to implementation, a red-flag checklist, a judgment on whether the tests are adequate, and a written review report. Use when work is believed complete and someone wants to merge, ship, or report success; when reviewing a diff, pull request, or design document, your own or someone else's; when checking an implementation against its spec; or when weighing whether "all tests pass" is enough. Do not use to write or fix the code under review; use an implementation skill.
