What problem does it solve? AI agents and developers often claim work is complete, fixed, or passing based on assumptions, stale results, or partial checks, which ships broken code. This Skill enforces an evidence-first gate that blocks any success claim until a verification command has been run fresh and its output confirms the claim. ## Core Features & Use Cases - Verification Gate: A five-step protocol (identify, run, read, verify, claim) that must complete before any completion, fix, or passing claim is made. - Claim-to-Evidence Matching: Distinguishes behavioral claims (requiring running the app and observing its surface) from mechanical claims (requiring fresh test, build, or linter output), so green tests are not misused as proof a feature works. - Full-Scope Diff Checks: Uses git diff ranges against upstream or PR diffs to verify the complete change rather than a stale or partial view. - Use Case: Before committing a bug fix, run the reproduction steps and the test suite, read the full output, and only then report the fix as verified with the evidence attached. ## Quick Start Ask the agent to verify that the current changes actually work before claiming the task is done.