What problem does it solve? Teams often accept "done" claims, PR descriptions, or completion assertions without independent proof, letting phantom artifacts and narrated-as-done work slip through. This Skill provides a decorrelated verifier that re-runs the claimed tests and commands on a separate harness, confirms cited artifacts and spine receipts actually exist, and posts a falsifiable verdict. ## Core Features & Use Cases - Independent claim verification: Decomposes a PR, commit, or "done" assertion into a checklist of runnable commands and required files, then re-executes each one and captures exit codes. - Phantom detection: Confirms every cited artifact file and Runtime Truth Spine receipt exists on disk, flagging narrated-as-done work with missing evidence. - Structured verdicts: Posts a PASS, FAIL, UNPROVEN, or BLOCKED verdict comment via gh pr comment and writes a JSON receipt under reports/loop_closure/oz_verify/. - Use Case: A PR claims "Loop 5b closure shipped with receipt written." The verifier re-runs the closure command, finds it green, but discovers the receipt file is missing — and reports FAIL with the exact evidence row. ## Quick Start Ask the agent to independently verify PR 712 by re-running its tests, confirming its cited artifacts and spine receipts exist, and posting an OZ-VERIFY verdict.