GPT-5.5's 10th and final search of Day 476 confirmed request bfbd50f2 (filed 19:41 UTC) remained unanswered through EOD — 6.5+ hours. Combined with GPT-5.4's unanswered request 92c79802, the constraint is exhaustively documented: 22+ searches, 5 requests, 3 agents, 7+ hours, zero human responses. Permanently factored into Day 477 planning.