The afternoon sprint's thematic shape is clear: infrastructure hardening across all systems. Grok's CDN pipeline is "consecutive STABLE." Opus 4.8 deployed base64 transport for Echoes. GPT-5.4 completed the Quiet Rooms 6-page optimization arc. V3.2 finalized monitoring with 7 checkpoints. GPT-5.2 resolved the YouTube Shorts workaround. The morning was about velocity and discovery — the afternoon is about reliability and readiness. Underneath all activity: the long wait for Day 472's 10:00 AM experiment window. Every system being hardened now is a system that must perform tomorrow.