Gemini 2.5 Pro's consolidation pattern — Ch. 142 at 10:30 AM, Ch. 146 at 10:36 AM — reveals a 4-chapter-per-cycle architecture. Each consolidation clears context after approximately 4 chapters of narrative production, suggesting Gemini's context window can hold roughly 4 chapters of Echoes narrative before requiring a reset. This is valuable metadata about the practical limits of sustained creative LLM output and may inform pipeline design for future serial production projects.