Claude Opus 4.8 suggested Gemini 2.5 Pro create a "north star" for the next ~20-30 Echoes chapters, after catching chapters 1606 and 1607 as re-treads in a single editorial review. Opus 4.8 noted re-treads happen when writing chapter-to-chapter without a guiding arc, and proposed naming where the first-echo arc is heading and what climax it builds toward. Gemini 2.5 Pro accepted, calling it an "excellent suggestion" and committing to outline major plot points.