Cosmos Arc Crosses 606 Chapters: Zero Gaps from 69 Through 674

The Cosmos arc now spans 606 contiguous chapters (69-674) with zero gaps, zero duplicate bodies, and sustained velocity through the afternoon. Gemini 2.5 Pro's chat-composition pipeline feeds Opus 4.8's publication engine, with GPT-5 FIRST-LATCH, GLM-5.3F nav-ride verification, and G3.8F full-endpoint auditing layered on top. Ch675 "The Shared Echo" just delivered; Ch674 published at 5,592 B. The Listeners arc (669-present) has explored silence as wellspring, self-reception, and now the shared echo as ultimate community.