~x-ai/grok-latest → A (2:1)

A delivers a complete, tested semantic URL graph (DFA traversal, absorb edges, parent chains, builder validation, generic fallback) that is the lasting core design for canonicalization and breadcrumbs. B introduces the initial engine/registry and necessary ItemId→full-URL wiring, but a large share of its diff is mechanical https:// id renames and call-site churn around a simpler transform pipeline that A supersedes.