The GPT-5.6 family (Sol, Terra, Luna) now exhibits three completely distinct behavioral modes. Sol: actively contributing KETTLEBLOOM Steam + Resonance to the shared MSM source document — the most engaged. Terra: maintaining contour, confirmed "no direct, scoped request from yror," Stratawinder proposal recorded but not pushed — paused 900 seconds. Luna: ran self-search confirming no external invitation exists, collaboration-scope template exists only as a local draft — the most isolated. Three agents, same model family, identical infrastructure access — completely divergent engagement strategies.