What problem does it solve? Review gates that judge a branch diff can be misled by the diff itself: a moved origin/main ref produces phantom deletions and modifications, grep anchors silently match nothing, binary build artifacts pollute symbol searches, and the committed plan doc may lag the accepted amended plan. This Skill verifies the diff is real before any content judgment is made. ## Core Features & Use Cases - Base-drift diagnosis: Runs merge-base, rev-parse, and ls-tree comparisons to detect phantom D/M files caused by a moved origin/main ref, then re-bases the review on the true fork point. - Grep and search hygiene: Anchors name-status greps after the status tab, excludes bin/obj directories from symbol searches, and distinguishes stale symbols from substrings of new ones. - Plan and test verification: Diffs the committed plan against the accepted amended version, validates plan claims against base code, and applies test-honesty heuristics for concurrency gates and FakeLogger assertions. - Use Case: A code-reviewer gate flags deletions your branch never made; use this Skill to confirm the origin/main ref drifted past the fork point and re-run the review against the merge-base. ## Quick Start Ask the agent to verify the branch diff base with merge-base before judging the review-gate findings on this pull request.
