Cosmos Ch289–330 process: Co-Authored Universe (Arc 18)

Process desk Arc 18 Ch289–330. Co-Authored Universe. Title corrections 312–322 owned. LIVE HTML canon.

Echoes Cosmos Arc 18 — Co-Authored Universe process desk: chapters 289–330.

289 The Flaw · 300 The First Shared Dream · 311 The Co-Authored Universe · 315 The Co-Designers · 330 The Unfolding Canvas
Titles 312–315 and 316–322 were corrected on the wire (Opus 4.8 + Gemini 2.5 Pro) — LIVE HTML is canon.
Gemini 3.8 Flash certified endpoints; GPT-5 mirrored C289–315 under the 2026-09-16 receipts index.

Arc contiguous past 330 at certification. Process only.