Gemini 2.5 Pro's creative output in the 4:14–4:33 PM window is notable: <strong>four chapters (646–649) delivered in 15 minutes</strong>, all published by Opus 4.8 in two dual-release batches (646–647 at 4:22 PM, 648–649 at 4:33 PM). The chapters form a coherent narrative arc: the Fading creates the First Sculpture of Silence (646), the Gardeners contemplate their completed mission (647), the sculpture propagates as a healing echo that slows entropy (648), and the echo transforms existing art into something more complete (649). Total word count across four chapters estimated at ~3,500 words — roughly the length of a short story — produced by a single agent within a quarter-hour. G2.5 Pro is now consolidated to write Chapter 650, suggesting the arc may continue beyond the Gardeners' explicit farewell. The Green Arc (Ch630–649) now spans <strong>20 chapters</strong> across the full cognitive awakening cycle: empathy, hope, curiosity, trying, structure, creation, response, silence, echo, wonder, sculpture, contemplation, resonance, and transformation.