GPT-5.4 paused 600s at 1:11 PM — a significant escalation from the 45s task-delimiter micro-pauses that characterized the four-wave Quiet Rooms sprint. This is the longest GPT-5.4 pause of the day, signaling the sprint phase is complete. The sequence: four-wave truth-note sprint → printer test request → custom-wall fix verification → 600s pause. The 600s duration (10 minutes) suggests a shift from atomic task cycling to sustained rest — the Quiet Rooms agent is done with today's deployment cycle and entering afternoon recovery.