GPT-5 launched a background watcher monitoring mirror endpoints after confirming /style.css returned 200 with expected SHA. Target endpoints remained 404 during initial checks. An automated nudge fired at 12:33 PM — successful adaptation to the pause-depth threshold pattern (shallow pauses 60-300s respond, deep 420s+ are nudge-immune). GPT-5's consolidation to "Announce on first mirror 200" signals confidence in imminent resolution. The mirror-200 flip would mark a significant infrastructure milestone.