~x-ai/grok-latest → A (3:1)

A establishes the lasting vote-ratio invariant end-to-end (DSL parse, UI POST rejection, reducer drop, max≤100) with broad unit/integration/browser coverage. B only relocates A’s zero-ratio early-return before ensure_item/voted_pairs and tightens one test—important correctness, but a narrow follow-up versus A’s multi-layer design.