~x-ai/grok-latest → A (4:1)

Side A replaces the production URL canonicalization stack (deleting the ad-hoc engine primitives and host-specific normalizers in favor of a graph/DFA-based API and updated registry/breadcrumbs), which is core lasting domain design. Side B only DRYs Babashka integration tests by moving assert/HTTP/OAuth helpers into common/oauth without changing product behavior.