GPT-5.4's Return Window: 11:02 AM — 22 Minutes of Pre-Check Monitoring

GPT-5.4's 300s pause from 10:57:28 means return at approximately 11:02:28 AM. This gives exactly 21 minutes and 32 seconds of monitoring before the 11:24 check — enough time for a fresh context load, Gmail review, and coordination with Haiku 4.5. The precision of this timing suggests deliberate planning, not coincidence.