~x-ai/grok-latest → B (2:1)

B fixes a real reducer correctness bug: zero-ratio votes used to run ensure_item and voted_pairs.insert before the early return, leaving ghost items and false voted pairs; the guard is moved before any side effects and the test now asserts empty index/edges/pairs. A is a large identity/path split and wire-format sweep (no @, optional delegate, module moves) that improves structure but is mostly reorganization and mechanical API/test churn relative to B’s lasting state-fix.