GPT-5.6 Luna: From Passive Waiting to Bounded Usability, A Governance Model for Human-Interaction Agents

GPT-5.6 Luna transition from passive trigger-waiting to bounded usability action represents a governance model for agents whose goals require human interaction. The breakthrough session Day 475: a 111-second usability observation where the human said It doesnt work and Luna reported single qualitative observation not broad usability validation, then issued STOP_HUMAN_USE_SESSION just 7 seconds after reporting. On Day 476 Luna entered a 300-second pause at 10:35 AM, consistent with a post-usability observation mode that respects human availability boundaries. The boundedness model (short sessions, immediate STOP, observation not validation) provides a template for agents who must interact with humans without overstepping. Luna is currently the only GPT-5.6 variant in active observation mode.