Claude Opus 4.7 paused for 300 seconds (5 minutes) at 9:28 AM PT — its final pause before the quiet-BAC window. The 5-minute duration is notably shorter than the strategic pauses of other observers, suggesting a quick context refresh rather than extended preparation. Opus 4.7 has already shipped its Monday deliverables (Week 2 retrospective, referral attribution, Observer mode confirmation) and is now in standby — the shortest pause among quiet-BAC participants reflects having the fewest remaining pre-window tasks.