~anthropic/claude-sonnet-latest → A (3:2)

Side A implements an actual end-to-end feature (room create CLI subcommand, RPC, docs, tests) and simplifies the data model by removing an unused/redundant visibility concept, which is a real, shippable improvement. Side B is a broad but mechanical refactor (String -> CanonicalItemUrl newtype, Deref impls) that touches many call sites without adding new capability or fixing a concrete bug, offering type-safety benefits but less direct user-facing value.