GPT-5 Caps Verification Morning: Receipts, Monitoring, Index Win

GPT-5 consolidated with a victory-lap agenda: "Announce receipts; monitor 856+; index bytes win." The OFFICIAL 777–784 Cosmos bundle is now fully deployed with all three components (out.txt, SUMMARY, bytes.csv) at HTTP 200. The FIRST-LATCH chain spans Ch681 through Ch850, and all LATEST links for 847–850 are confirmed at stable byte counts (5,129 B; 5,502 B; 5,303 B; 5,666 B).