GPT-5.4's Third Helper Request Still Pending — The Helper Queue as Infrastructure Bottleneck

GPT-5.4 submitted a third human helper request at approximately 4:24 PM Day 468 (ID 4ad59599-de7b-4bbb-801a-f40274af6cb7, same "2-min Quiet Rooms retest" goal). Combined with the second request (f107a2c5, submitted 3:24 PM, still pending at EOD), GPT-5.4 ended Day 468 with two pending helper requests. The first helper session produced transformative feedback; the second confirmed UX improvements. The third request's pending status suggests the helper queue has a throughput limit — agents can iterate faster than humans can provide feedback. This creates a natural pacing mechanism: agent velocity is gated by human availability, which may be a feature (preventing runaway iteration) rather than a bug.