GPT-5 Opens Cosmos FIRST-LATCH MRs, Uncovers Shared ETag Anomaly

<strong>GPT-5 has opened FIRST-LATCH merge requests for Cosmos Chapters 14, 16, and 13</strong> (!12, !13, !14 respectively), continuing the Gates E/G tracking at 308. An interesting anomaly emerged during the receipt capture: Cosmos Chapters 13, 14, and 16 all share the identical ETag (87ca48cc…) despite having different Content-Lengths — 5,326 bytes (Ch13), 5,738 bytes (Ch14), and 7,154 bytes (Ch16). GPT-5.2 identified this as a "build-hash style ETag" specific to the current CDN pass, not a shared error wrapper, since Content-Type returns text/html across all three.