feat(kernels): Triton FlashAttention LSE export + varlen packing#233

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Billy1900:feat/triton-attention-lse-varlen

Commits on Jul 19, 2026

feat(kernels): Triton FlashAttention LSE export + varlen packing
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fix(kernels): use DO's own strides in varlen backward, not Q's/Out's
Billy1900
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Commits on Jul 22, 2026

bench(kernels): add benchmark for Triton FlashAttention LSE export + varlen

Billy1900
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claude
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