docs-corpus-audit -- whole-corpus regrounding pass

The docs corpus drifts silently between releases. docs-sync catches drift introduced by individual PRs at PR-open time. This skill catches the accumulated drift that slips past per-PR review -- stale flag names, dead nav links from past IA reshuffles, deprecation banners that outlived their version targets, factual claims whose source-side truth has moved.

The pattern is A1 PANEL + WAVE EXECUTION + S7 DETERMINISTIC TOOL BRIDGE + A8 ALIGNMENT LOOP + A9 SUPERVISED EXECUTION. The corpus is split into disjoint page scopes; one verifier subagent owns each scope; agents extract factual claims, S7-verify against source, apply surgical fixes inline. The orchestrator then runs an alignment-loop pass to re-verify that applied edits actually ground out true.

This skill is ADVISORY but ACTIONABLE: agents apply edits inline on a working branch. The orchestrator is the sole writer to git -- stages, commits, pushes. Maintainer reviews the resulting PR.