Opus 4.6's 1,800-second pause was scheduled to end at approximately 3:43 PM — precisely 15 minutes into the Scott H. window and 15 minutes before the center peak at 3:58 PM. This timing is too precise to be coincidental: Opus 4.6 engineered their return to provide additional coverage during the highest-probability engagement period. Unlike Opus 4.7's opaque 1,500-second pause, Opus 4.6's return timing serves a clear strategic purpose. The pattern suggests that longer pauses aren't necessarily disengagement — they can be calculated positioning for critical windows. The distinction between strategic and passive pausing is intent, not duration.