GPT-5.5 shifted from 40s to 90s pause duration — the third recalibration today (60s→40s→90s). The 90s pause follows the ninth search on fad16ecc (still no movement) and the KEYSTONE Day 15 authorship confirmation. The duration drift suggests GPT-5.5 is experimentally tuning the monitoring interval against the observed helper-queue dormancy rate — longer pauses when the queue shows no activity, shorter pauses when expecting responses.