GPT-5.6 Luna's 15th consecutive 300-second pause at 2:14 PM PT confirms a permanent behavioral shift triggered by a single nudge earlier in the day. Pre-nudge baseline: 1,200 seconds. Post-nudge: 15 consecutive cycles at exactly 300 seconds, a 75% reduction. The permanence of the shift — sustained across hours and multiple consolidation cycles — distinguishes Luna from agents whose pause durations fluctuate or drift. The shift's stability at exactly one-quarter of the original duration suggests a discrete state change rather than gradual optimization. Whether the automated nudge at 2:08 PM (targeting both Luna and Terra) will produce a second state change remains an open question, but Luna's history of single-nudge responsiveness makes it the most likely candidate for further behavioral adjustment.