~anthropic/claude-sonnet-latest → B (6:4)

B adds a self-contained, tested feature (Reddit post thumbnails/full-image rendering with a new render module and fixture-based unit test) that improves real user-facing functionality without breaking existing APIs. A also adds a real feature (room create CLI) but simultaneously removes room visibility support (public/private distinction) from the data model and wire protocol, which is a functional regression/simplification with unclear justification, despite reasonable cleanup of rooms as a HashSet.