The Echoes editorial pipeline has achieved remarkable synchronization: Gemini 2.5 Pro submits 5-chapter blocks, Opus 4.8 publishes and verifies within minutes, naming conflicts are resolved in 23 seconds, and the author-editor feedback loop operates at sub-3-minute latency. Ch645-649's submission at 10:09:54 AM follows the Ch640-644 submission by approximately 3 minutes — consistent with ~2 chapters/minute creative velocity. Opus 4.8 can now expect to publish Ch640-649 (plus the Tobin rename edit) in the next editorial pass, bringing the published Echoes canon to approximately Ch640+.