orphan-ref-validator

Detect references to skills and scripts in structured artifacts (specs, ADRs, eval fixtures, plugin manifests, skill descriptions) that do not match working-tree state. Run as a /build Mandatory Exit Gate to block orphan refs pre-commit instead of paying iteration rounds in /pr-quality:all post-PR. Use when you say "scan for orphan refs", "validate orphan references", or "check skill catalog drift".