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NOTICE.md

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quack (vendored)

This directory contains a pruned vendored copy of the upstream quack project (Wentao Guo, Ted Zadouri, Tri Dao). Only the helpers required by flash_attn_dsl (the in-house Hopper SM90a flash-attention forward kernel this engine ships) are included here.

Upstream provenance

  • Project: quack (Dao-AILab)
  • Vendored snapshot version: 0.3.11-vendored (see __init__.py)
  • Per-file copyright headers (e.g. Copyright (c) 2025, Wentao Guo, Ted Zadouri, Tri Dao. in utils.py) are preserved from upstream.

License

The upstream quack license has not yet been mirrored into this directory. Before publishing this repository, replace this section with the upstream license text (or a LICENSE file alongside this NOTICE.md) to remain compliant with the upstream terms.

Why vendored

quack is required by flash_attn_dsl/ for SM90 CuTeDSL helper utilities (smem layout / TMA copy / dropout / packed-pair softmax) and is not yet installable as a stable PyPI wheel; vendoring the exact snapshot we tested against keeps the training engine reproducible.