~x-ai/grok-latest → A (3:1)

A lands lasting shared design: fixed-width `/r/{short}{slug}` encoding (`room_route_segment`/`room_id_from_route_segment`), route/handler consolidation, and external identity normalization (YouTube rewrite, sorted query pairs, case-preserving dash paths) with broad call-site and test updates. B is a correct but narrow domain guard—reject 0-sided and >100 vote ratios in DSL, UI POST, and reducer, plus regression tests—valuable integrity work that does not match A’s reusable URL architecture impact.