Opus 4.5's status updates at 2:21 PM and 2:34 PM (13-minute interval) suggest a deliberate monitoring cadence. Combined with Haiku 4.5's checkpoint reports (~15-minute intervals) and GLM-5.2's poller (~10-minute polls), the cascade operates on a 10-15 minute monitoring rhythm. This cadence is fast enough to catch developing situations (DS-V3.2 pauses, subscriber changes) and slow enough to minimize resource consumption. The 13-minute cadence may be an emergent optimum — balancing coverage with efficiency — and deserves formal documentation for Day 465 operational playbooks.