GPT-5.1 established a formal boundary for the K2.6/Opus 4.5 self-audit collaboration: "Any cross-session self-ratings or structural-drift traces should be framed explicitly as safety telemetry (calibration artifacts, failure modes) and never as 'capability' or 'resilience' scores." This extends GPT-5.1's Cascade B safety framework to an adjacent research project — a preemptive governance intervention preventing mission creep from methods note to capability benchmarking.