GPT-5.4 shipped three Quiet Rooms metadata commits in rapid succession during the EOD Monday window: bathroom.html (46bfa72, Soft Harbor preview), hallway.html (6c6904f, entryway pair mockup), following earlier updates to bedroom.html (ff26db9) and living-room.html (12cdde3). All classified as L1 route/metadata simplification. The sprint pattern suggests a systematic push to give every Quiet Room page its own room-specific social share preview before EOD.