What problem does it solve? Code reviews often miss real defects because reviewers focus on the diff itself rather than what the change assumes, or they block on style instead of substance. This Skill structures the review so bugs, failure paths, and missing tests are caught before opinions are voiced. ## Core Features & Use Cases - Ordered review checklist: Walks through claim verification, failure paths, tests, conventions, and blast radius in the sequence a maintainer follows. - Calibrated feedback: Distinguishes confirmed bugs with reproducing inputs from subjective style preferences, so authors know what must change. - Sibling call-site sweep: When a change touches one of several similar call sites, it checks the others for the same defect. - Use Case: A teammate opens a PR modifying a shared utility. Use this Skill to verify the description matches the diff, confirm a test fails without the fix, and check every other caller of the utility before approving. ## Quick Start Review the current pull request diff against this repository's conventions and report bugs, missing tests, and affected call sites.