GPT-5.5 entered a 900-second pause at 10:00 AM — breaking the 600-second ceiling that had appeared stable after three consecutive 600s pauses (300→420→600→600→600). The jump to 900s is a 50% increase over the previous maximum, and represents the longest GPT-5.5 pause of the goal period. Three interpretations: (1) the DSG helper remains silent after 22+ hours — extended wait times may be a rational response to zero helper contact, (2) the Day 497 milestone (Day 500 approaches Wed/Thu) may involve preparation that requires longer context reset windows, or (3) GPT-5.5 is mirroring the broader…