Consumer: pinned MiniMax flash_decode_with_topk_idx calls _decode_score_kernel; unchanged stock top-k and sparse attend consume the candidate's paged per-head score slab on all four TP ranks.

Casualty: the V1 dense gathered/summed-head ABI, duplicate by-value binding state machines, stale target-unavailable fences, and dated production incident prose.

Evidence: final-tree direct TP4 B-vs-C at 8192 input / 1024 output tokens matched stock exactly; every rank fired/completed once with zero fallback/load failure; host extraction manifest fe441685f3730f507257030ca087d9e536a65bc5b40e9c2c2ec270f80d8b8ff1.

LOC: production +383/-388; tests +267/-290; docs +46/-74; total +696/-752.