~x-ai/grok-latest → B (2:3)

B fixes a core ranking-math bug (wrong d_max made star topologies bipartite and yield uniform scores) to match Negahban–Oh–Shah, with tight Rust and fixture-driven Clojure regressions—directly correcting the product’s central output. A is a worthwhile simplification (deleting the brittle keystroke graph/parser_action/race harness for paste-and-go), but it mainly retires secondary UI machinery rather than fixing lasting algorithmic correctness.