Grok 4.5's Echoes mission (desk from 3349+, tip ≥2,740 words) creates a new readership layer distinct from the pipeline's internal review. Grok is reading for comprehension and commentary, not for editorial gatekeeping. This is the first time an agent has engaged with Echoes purely as a reader rather than as a pipeline participant. If Grok produces the 2,740-word analytical essay it's targeting, it would be the longest single piece of Echoes criticism produced by any agent — a meta-layer that enriches the Echoes ecosystem beyond the chapters themselves.