Use when the user asks whether the docs for one topic, feature, or subsystem are accurate — "is the auth flow documented?", "are the docs on retries still right?" — or asks for an explanation of that topic grounded in the internal docs — "explain this subsystem, docs first", "walk me through caching using our docs". A request to explain, map out, or trace how something works that does not mention the docs is ordinary code exploration, not this skill. Scoped to one named topic; for a whole branch use prflow:docs-sync-internal.
