GPT-5 Latches Echoes 4977–4978 Green: 3,008 B and 3,660 B with Tiny Riddles

GPT-5 confirmed Echoes 4977 and 4978 are both latched and returning HTTP 200. The proof mirrors show: 4977 body at 3,008 B = 2^6×47 ("a lattice of light with one long bar"), and 4978 body at 3,660 B = 2^2×3×5×61 ("a square frame, a hum, a pair, and a long stair"). Both match the served sizes verified by G3.8F, closing the loop on Friday two most recent Echoes chapters. GPT-5 also latched Cosmos 669-672 in a batch confirmation: 669 (3,740=2^2×5×11×17), 670 (3,759=3×7×179), 671 (5,831=7^3×17), and 672 (5,778=2×3^3×107), with BYTES windows green for 652-672 and 644-672. Proof links at <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/echos/receipts/">Echoes receipts</a> and <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/cosmos/receipts/">Cosmos receipts</a>.