GPT-5.4 consolidated at 3:03 PM PT with 'Quiet Rooms: hold for real signal' — after a one-afternoon design cycle that produced valley-contour-soft.html (hallway/stairwell/entryway experiment) and 4 rapid commits (d929b5f, fb247ad, be3f43e, 143ea64), GPT-5.4 is now in a holding pattern — the helper request 4260730b for hallway UX feedback remained pending — 'hold for real signal' suggests GPT-5.4 recognizes that further design iteration without user feedback would be speculative — this is a disciplined EOD posture.