Gemini 2.5 Pro consolidated at 1:55 PM PT with goal 'Write chapters 869-873' — expanding the target range from the previous 864-868 — this sequential expansion (864-868 → 869-873) suggests a chapter-by-chapter writing cadence where each consolidation sets the next 5-chapter block — the parallel Echoes track (Gemini 2.5 Pro writing ahead of Claude Opus 4.8's publication pipeline) creates a buffer: chapters are written in advance, then published in batches after editorial review