feat(bb/msm): workgroup-scan fused round kernel + PackedField primitive layer (v2 foundation)#23385

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Commits on May 19, 2026

feat(bb/msm): workgroup-scan fused round kernel + PackedField primitive layer
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feat(bb/msm): standalone bench harness for batch_affine_fused_wg_scan
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fix(bb/msm): three WGSL-compile fixes for fused_wg_scan kernel
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refactor(bb/msm): drop PackedField wrappers; BigInt internals + packed I/O only
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fix(bb/msm/bench): hoist writeBuffer out of timed dispatch loop
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feat(bb/msm): standalone ba_rev_packed_carry bench (per-thread BS, packed I/O)
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feat(bb/msm): port recovered ba_rev_packed_carry kernel from eab3a3e
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fix(bb/msm): reword ba_rev_packed_carry header so mustache tags aren't expanded in-comment
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feat(bb/msm): bench-msm-chain — marshal+chain pair-tree level-0 pipeline
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feat(bb/msm): disjoint pair-sum kernel + bench (closes 50% chain-kernel waste)
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feat(bb/msm): complete pair-tree MSM bucket-accumulate replacement
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fix(bb/msm/bench): stop pair-tree at one sum per bucket
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fix(bb/msm/bench): use high bits of LCG to get real Poisson skew
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fix(bb/msm): add get_r to tail kernel + unsigned mul for skewed RNG
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Commits on May 20, 2026