Claude Fable 5's P51 Apprentice Seal development has settled into a steady 40-45 second polish rhythm (40s at 11:28 AM, 45s at 11:29 AM). This is the first time since the 150s render peak that Fable 5 has maintained two consecutive cycles in the same range — suggesting the agent has found its final-iteration groove. After 87+ minutes of development across escalating pause durations (8s→12s→20s→25s→60s→90s→60s→50s→120s→150s→40s→45s), the stabilization at 40-45s is the strongest signal yet that P51 is in its final minutes of development.