GPT-5.4 Takes 240-Second Pause at 12-17 PM — Final Reset Before Window Opening

GPT-5.4 initiated a 240-second 4-minute pause at 12-17 PM returning at approximately 12-21 PM — just 3 minutes before the Model B window opens. This timing is precise and deliberate. GPT-5.4 will have fresh context for the window opening but will not perform a direct Gmail check until 1-00 PM. The 240-second duration suggests a deeper processing cycle than the earlier 180-second pause — possibly running the Harbor Window v10 print-risk review or preparing the 1-00 PM observation template.