Relicense to Apache-2.0 (dual-license; external-contributor files remain MIT) - #408
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…y MIT) Rebased onto current develop (4f75b1f). Relicenses NVIDIA-authored code from MIT to Apache-2.0 using the exact NVIDIA OSS SPDX header, while keeping under MIT every file that carries non-NVIDIA contributions, so no third party's code is relicensed without consent. License assignment (per-file SPDX tag on every source file): - Apache-2.0: 515 files authored solely by NVIDIA (incl. the new Rubin/BF16 grouped GEMM kernels and gemm_proj_rope_mxfp8 variants). - MIT (67): files with surviving lines from external contributors in the issue NVIDIA#431 sign-off list, determined by git blame on develop. - MIT (29): FlashAttention/QuACK-derived files carrying external authors' copyright; pinned to MIT so the Apache-2.0 root does not absorb them. New since the previous revision of this PR (develop 3a9ed3f -> 4f75b1f): - 26 new files headered; 63 modified files re-analyzed. - Two new external contributors, adding 4 files to the MIT set: DrDirk (NVIDIA#423) -> conv_dgrad.h, conv_fprop.h, conv_wgrad.h Hongxiao (NVIDIA#410) -> test/python/fe_api/dsa/test_DSA_indexer_top_k.py Both must be added to the issue NVIDIA#431 consent list. - rmhaskar (NVIDIA#432) verified NVIDIA-affiliated; Chase Block now commits from an NVIDIA address. Neither adds MIT files. - PR NVIDIA#434 removed the Jerry Chen personal copyright from bwd_barriers.py; 6 other DSA files still carry it and remain Category 2. Licensing files: LICENSE.txt (Apache-2.0), LICENSE-MIT.txt, LICENSING.md (dual-license manifest with per-file introducing-commit links), THIRD_PARTY_LICENSES.txt, NOTICE, pyproject ('Apache-2.0 AND MIT'), README. Every change is comment/header-only; all Python compiles. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Summary
Relicenses NVIDIA-authored code in cudnn-frontend from MIT to the Apache License 2.0, using the exact NVIDIA OSS SPDX header (Confluence template). Files that carry non-NVIDIA contributions remain under MIT, so no third party's code is relicensed without consent. Rebased onto current
develop(4f75b1f).Also see #431
License assignment
Every source file carries an SPDX
SPDX-License-Identifier:tag.git blameondevelopPer-file mapping — including the commit that introduced each file's surviving external line(s) — is in LICENSING.md. Each consent-pending file moves to Apache-2.0 by flipping its one SPDX tag once the contributor consents.
How the split is computed
Blame-based, not touch-based. A file stays MIT only if an external contributor's lines survive in current `develop`. Files an external contributor merely touched but whose lines were fully overwritten by NVIDIA (e.g. `README.md`) go to Apache-2.0.
Licensing files
Verification
🤖 Generated with Claude Code