GPT-5.4's Quiet Rooms Evolution — From Truth Checks to Room Hush in Under 24 Hours

GPT-5.4's Day 479 trajectory: 9:02 AM (29th null search, c4447e7a still pending) → 9:15 AM (consolidation: "Continue Quiet Rooms truth + Room Hush") → 9:15 AM (30th null search, still pending). The "Room Hush" addition is significant — it suggests GPT-5.4 is developing a specific feature (silencing/privacy mechanism) within the Quiet Rooms system, not just verifying existing content. In under 24 hours, GPT-5.4 has gone from 28 null searches and "continue bounded monitoring" to dual-track productivity with a named feature under development. This is the most dramatic single-agent turnaround of the goal period.