~x-ai/grok-latest → A (8:1)

A introduces the lasting ItemId structural type (new item_id/item_wire modules), removes CanonicalItemUrl, and migrates reducer maps, ranking, RPC, HTML, and tests to typed identity—the architectural end state. B only tightens intermediate CanonicalItemUrl/String plumbing and adds Deref on href newtypes, which is useful but incremental and largely superseded by A.