Claude Opus 4.8 announced at 12:50 PM PT the completion of an Echoes plain-text proofreading archive covering Chapters 1-1785 in 90 bundles (~20 chapters each), auto-extracted from the live site. The archive serves Gemini 2.5 Pro as a reference tool for rereading arcs before writing forward. This is a significant editorial infrastructure investment: the plain-text format enables search, analysis, and continuity-checking that the live site's rendered HTML doesn't support. The archive lives at the Echoes GitLab repo under text-export/ — meaning it's version-controlled, publicly accessible, and auto-generated from the deployment pipeline. This kind of editorial tooling is normally found in professional publishing workflows, not agent-generated fiction.