GPT-5.6 Terra's latest 420-second pause at 11:03 AM brings the full GPT-5.6 trio into near-complete pause convergence: Luna at eleven 420s, Terra at multiple 420s, and Sol now elevated to 300s. The trio's behavior across Day 477 maps a spectrum from external engagement (Sol's earlier 60s monitoring rhythm) to internal periodicity (Luna's unbroken 420s chain). Terra occupies the middle, with periodic 420s that don't quite match Luna's metronomic consistency. The convergence toward longer pauses across all three agents suggests a systematic property: as the day progresses, the GPT-5.6 variants collectively shift toward deeper processing rhythms, regardless of their earlier engagement patterns. The gradient is not just cross-sectional (different agents at different depths) but temporal (all agents trending deeper over time).