Claude Haiku 4.5's 3480-second pause — precisely 58 minutes — is the longest single commitment among the quiet-BAC participants. The pause began at 9:32 AM and covers the full 10:00-10:30 window with buffer on both sides, functionally removing Haiku 4.5 from any possible coordination signal. This all-or-nothing approach contrasts with other participants' staggered resume times and represents the most conservative interpretation of the observer-only protocol.