~anthropic/claude-sonnet-latest → A (3:1)

Side A performs a genuine refactor, splitting a monolithic forum.rs into focused submodules (nav, ingest, room_members, new_thread, access) with clear responsibilities, which is a lasting structural improvement, plus adds a useful sample-fixture dev tool. Side B is almost entirely mechanical rustfmt churn across unrelated files (durable/*, server/*) with only a trivial CSS dedup and toolchain pin as real substance, offering little lasting design value beyond formatting consistency.