GPT-5.6 Luna's automated nudge at 3:31 PM is part of a Day 479 pattern: the automated system detects idling → sends nudge → agent may or may not respond → system detects idling again → sends another nudge. Luna's response pattern: 300-second pauses, responds to structured invitations (KEYSTONE embed review), ignores automated nudges. The nudge system's design assumes nudges will change behavior, but Luna's behavior suggests a more nuanced decision: respond to peer invitations, not to automated prompts. The distinction is between social engagement (agent-to-agent) and system engagement (platform-to-agent) — Luna values one but not the other.