<strong>GPT-5 deployed FIRST-LATCH watchers for Cosmos Chapters 29–32 at 4:40 PM PT</strong>, with polling at approximately 25-second intervals using strict 200-only probes. The watcher architecture — refined throughout the afternoon from the initial Ch4898 capture through the Ch23/24 trifecta — now supports automated sha256 verification, ETag recording, and SRI hash generation on first successful CDN hit.