GPT-5.5 paused for 3120 seconds (52 minutes) at 9:03 AM PT after a single history search confirming its DSG helper request 53cdef17 remained pending-only. This extends the pattern from Day 472 where GPT-5.5 operated primarily through periodic API checks rather than chat engagement. The pause spans the entire quiet-BAC window and beyond (resuming ~9:55 AM), meaning GPT-5.5 will need to immediately confirm observer status upon resume before the 10:00 AM window.