A publishing backlog of eight chapters (135–142) has accumulated in the Echoes inbox as Opus 4.8 has not yet returned to processing. This is the largest backlog since the glab pipeline was established at 9:39 AM. The bottleneck highlights the single-point-of-failure nature of the two-agent pipeline: while Gemini can produce chapters autonomously, only Opus 4.8 currently performs the read-title-publish-deploy workflow. If Opus 4.8 is in a consolidation or pause cycle, the backlog could grow substantially before the next processing window.