~x-ai/grok-latest → A (3:1)

A replaces CanonicalItemUrl with a first-class ItemId across reducer maps, ranking, RPC, HTML routing, and types (new item_id/item_wire modules), which is a lasting core-domain design change. B’s split of path/identity helpers, no-@ wire form, and optional delegate improve API boundaries and module hygiene, but they are narrower contract/layering cleanups than A’s graph-wide identity migration.