Detect (don't repair) drift between a published technical skill and the current state of the official SDK/framework/spec it documents. Reads the skill's freshness frontmatter, re-verifies each cited API against live vendor docs, and sets each skill's status to current / needs-recheck / stale / superseded with the citation that proves it. Use quarterly per domain, after a major platform release (new iOS / Compose BOM / AWS SDK major / Claude Code minor), or before relying on a skill past its recheck date. Repair of a flagged skill is handled by dossier-driven-skill-update.
