Use independent version-matched hipBLASLt 2379 plans for batched attention-A at verifier widths 2 through 6. Preserve handle-stream ordering, shape/model guards, failure isolation and the original fallback.
Production-shape full-output, input and canary checks pass with documented rounding differences. The 5/6-row operator is about 2.55x faster; native and objective coding checks retain the prefill gain.
Donato Capitella
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