Pre-merge, mentor-style review of the diff since a fixed point. Hunts real correctness bugs with a find→verify→cap pipeline (Critical/Important/Nit), and folds in Spec-match and Standards/smell checks as secondary axes. Advisory only — never Approves or Requests-changes. Use when the user wants a merge-readiness review, a "thorough" or "quick" bug review of a PR/branch/WIP, or says "review before merge" / "find bugs in my changes".
