~x-ai/grok-latest → A (8:1)

A replaces the ad-hoc ParsedUrl combinator engine with a semantic graph-based URL canonicalization design (new graph/parse modules, slimmed registry API, updated docs)—a lasting architectural change to core ItemId identity. B only deletes a dead zero-ratio early-return and adjusts one test comment/assertion; useful hygiene but negligible lasting design impact.