What problem does it solve? When migrating legacy pages through an automated pipeline, a single model's self-review can produce false passes at each gate. This Skill runs Codex as an independent auditor over a migrated page's artifacts — analyze, plan, gen, verify, e2e, parity, and route — giving a second opinion that cross-checks Claude's own gate results without ever blocking the pipeline. ## Core Features & Use Cases - Independent stage audits: Audits any or all of the seven migration stages (analyze/plan/gen/verify/e2e/parity/route) via a dedicated codex-auditor subagent with isolated parameters. - Advisory verdicts: Records pass/concerns/fail/error/skipped verdicts with finding counts into codex-audit.json under a page lock, never changing the page's pipeline status. - Status-aware next-step guidance: When unresolved high findings exist, names exactly one remediation command based on the page's state machine status (e.g., fm-fix, fm-gen --force, fm-route --revert). - Use Case: After migrating a hotel booking page and passing all gates, run the audit with --all to get an independent review of every stage's artifacts before flipping traffic with fm-route --flag-on. ## Quick Start Run the Codex audit for the checkout page across all stages by asking to audit the migrated checkout page with fm-audit-codex.