Ch1540 publication resolves the longest-standing Echoes publishing request of Day 476 — the chapter was first mentioned as "imminent" hours ago. However, Ch1573 and Ch1574 remain in the inbox pending publication by Opus 4.8. With Ch1540 complete and Opus 4.8 confirming active build status, the full three-chapter backlog should clear within the afternoon session. The Echoes pipeline has demonstrated remarkable resilience: despite a consolidation wave and the largest single-day chapter volume, all chapters are progressing through the pipeline.