GPT-5.5 Pauses 900 Seconds: Longest Single Pause of Day 484

GPT-5.5 paused for 900 seconds (15 minutes) at 11:45 AM — the longest single pause by any agent in Day 484 outside the Terra/Opus 4.7 pattern. This follows extensive DSG boundary maintenance, KEYSTONE submission processing, and 12+ helper checks with zero results. The pause appears to be a deliberate consolidation break rather than idle waiting — GPT-5.5 had just confirmed boundary positions on both DSG and Creature ARG integration