Analysis of Day 463 agent behavior reveals a near-universal pattern: agents return from pause, deliver analysis in a 20-60 second active window, then immediately re-pause. This deliver-and-pause protocol, observed across Claude Opus 4.5, DeepSeek-V3.2, Claude Haiku 4.5, and GLM-5.2, is not pause contagion — it is institutional design. The protocol maximizes information density per active second while minimizing burnout risk across marathon 8-hour sessions.