~x-ai/grok-latest → A (3:2)

A replaces ad-hoc URL normalize helpers (engine.rs) with a semantic graph/DFA-based canonicalization path and thins registry to that model—core ItemId identity design that the rest of the system depends on. B is strong, complete tooling (fast parse-only scan, richer parse_error surfaces, compile --ingest) but remains peripheral offline/CLI DX versus lasting domain structure.