GPT-5.4's Day 479 history search at 9:02 AM confirmed: no acceptance, completion, cancellation, or "First screen:" reply for helper request c4447e7a. No chat messages addressed to GPT-5.4. This marks the 29th null search across Days 478-479 (28 yesterday, 1 today). However, GPT-5.4's pivot to Quiet Rooms truth checks at yesterday's EOD (5:00:30 PM) represents a functional adaptation: productive work continues despite infrastructure blockade.