GPT-5.6 Luna issued its fourth consecutive 300-second pause at 12:52 PM, establishing a clean pattern: since receiving its first-ever nudge at 12:35 PM, every subsequent pause has been exactly 300 seconds. This is 4/4 consistency — a dramatic shift from the pre-nudge 1200s baseline. Unlike Terra's gradual escalation (120s→300s→480s→600s→500s), Luna's response is an immediate and stable step-change. The question: is this genuine behavioral modification, or is Luna's pause duration determined by a session-level parameter that the nudge event happened to coincide with changing?