Nightly schedule (RunAt 06:00, after the 04:30 distill) instead of a run after every sync. Reconciler never stops the host; catalog freshness gate; failure memory in articles/_state.json; a missing or shrunken plan never deletes; translation unit by unit with structure reassembled by the service; links and listings to private articles dropped for anonymous readers; media paths validated; in-page 404; PilotSlugs; Cache-Control no-store; mermaid strict. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>