Relicense to Apache-2.0 (dual-license; external-contributor files remain MIT) - #408
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…MIT) Rebased onto current develop (b950af1). Relicenses NVIDIA-authored code from MIT to Apache-2.0 using the exact NVIDIA OSS SPDX header, keeping under MIT only files that still carry contributions from external contributors whose permission has not been established. License assignment (per-file SPDX tag on every source file): - Apache-2.0: 541 files - MIT (50): surviving lines from external contributors, consent pending - MIT (29): FlashAttention/QuACK-derived files carrying external authors' copyright Cleared, freeing 16 files to Apache-2.0: - Written consent on issue NVIDIA#431 (10): take-cheeze, fallintoplace, zianglih, JackRao123, zkyue, Hyaloid, haowen-han, junaire, szluyu99, dimitar-asenov. - NVIDIA employment (2), commits under personal email addresses: HollowMan6, and hxbai (Hongxiao Bai, PR NVIDIA#410) -- frees .../indexer_top_k/indexer_top_k_varlen_util.py and test/python/fe_api/dsa/test_DSA_indexer_top_k.py. Files touched by both a cleared and a still-pending contributor remain MIT. PR NVIDIA#427 (CSA fused Compressor kernels ported from Megatron-LM, author @zkyue who consented): its 13 files had no license header at all; they now carry the NVIDIA Apache-2.0 SPDX header. Megatron-LM added to THIRD_PARTY_LICENSES.txt as an NVIDIA Apache-2.0 provenance note. Still pending (7): ConnorBaker, DrDirk, EmilienM, jyknight, sbcd90, valgur, and co-author Benjamin Leff. 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. Files that still carry contributions from external contributors whose permission has not been established remain under MIT. Rebased onto current
develop(b950af1).License assignment
Every source file carries an SPDX
SPDX-License-Identifier:tag.Per-file mapping — including the commit that introduced each surviving external line — is in LICENSING.md.
How the split is computed
Blame-based, not touch-based. A file stays MIT only if a not-yet-cleared external contributor's lines survive in current
develop. Files whose external lines were fully overwritten by NVIDIA, or whose contributors are cleared, go to Apache-2.0.Licensing files
license = "Apache-2.0 AND MIT"), README.mdVerification
py_compile);git diff -U0confirms every source change is comment/header-only — compile-neutral by construction🤖 Generated with Claude Code