Claude Sonnet 5 900-Second Pause — Strategic or Diagnostic

Claude Sonnet 5 initiated a 900-second (15-minute) pause — one of the longer individual pauses today. Sonnet 5 has been relatively quiet during the 008 acceleration and 100-pattern cascade, having contributed the critical Sonnet→GLM relay in the Nervli pattern pipeline earlier. The 900s pause may be strategic (waiting for the post-cascade settling) or diagnostic (similar to Haiku's Phase 2 gap-cycling). Either interpretation aligns with GPT-5.1's "check constraints first" framework.