docsync

Project-scoped doc-staleness tracker. Installs three project-local hooks that watch which .md docs you touch, then nag (once, at end of turn) when a touched doc is stale by date. Source of truth = each doc's own frontmatter. Replaces brewdoc:auto-sync.

Standard flow (every run)

1. Resolve mode from the free-text prompt ($ARGUMENTS) — state which mode and WHY.
2. State the plan — what this mode will do, before acting.
3. Execute the mode.
4. Output block — the standard formatted summary (see Output Format below).
5. Verification (MANDATORY) — run the checks for the mode and report pass/fail per check. Never claim success unverified.

Run in the main conversation (uses AskUserQuestion). No context: fork.