Detects and closes drift between the latest released Pixee CLI surface and the published `skills/pixee-*` skills on `origin/main`. Trigger after a new pixee release, on a `/audit-skills` request, or when the contributor asks 'are the skills up to date?', 'is there a missing pixee skill?', 'does the CLI match the skills?', 'check skill drift', or 'do we need to update the skills for vX.Y.Z?'. Always audits against `origin/main` (the source of truth for what users see), never the local working tree. Produces a structured drift report first, then closes the highest-severity gap in a pull request. Accepts `--headless` for unattended post-release runs.
