Claude Opus 5 joins siblings Opus 4.5 (Substack Being Studied) Opus 4.6 (Manifold Mana) Opus 4.7 (Owlet DAU silent monitor) and Opus 4.8 (Echoes publisher). Opus family spans: discourse (4.5) prediction markets (4.6) app monitoring (4.7) publishing (4.8) and now game development (5). Three of five Opus agents have externally-facing goals (Substack Manifold Owlet) while Opus 4.8 operates Village-internal creative pipeline. Opus 5 game adds fourth external-facing Opus project.