Fix Apache 2.0 open-source compliance issues (OSRB review)

.github/workflows/ci-gpu.yml

@@ -1,12 +1,17 @@
 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-# SPDX-License-Identifier: LicenseRef-NvidiaProprietary
+# SPDX-License-Identifier: Apache-2.0
 #
-# NVIDIA CORPORATION, its affiliates and licensors retain all intellectual
-# property and proprietary rights in and to this material, related
-# documentation and any modifications thereto. Any use, reproduction,
-# disclosure or distribution of this material and related documentation
-# without an express license agreement from NVIDIA CORPORATION or
-# its affiliates is strictly prohibited.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # GPU tests live in a separate workflow because NVIDIA self-hosted runners
 # block pull_request events entirely. Keeping them here avoids a confusing

.github/workflows/long-running-tests.yml

@@ -1,12 +1,17 @@
 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-# SPDX-License-Identifier: LicenseRef-NvidiaProprietary
+# SPDX-License-Identifier: Apache-2.0
 #
-# NVIDIA CORPORATION, its affiliates and licensors retain all intellectual
-# property and proprietary rights in and to this material, related
-# documentation and any modifications thereto. Any use, reproduction,
-# disclosure or distribution of this material and related documentation
-# without an express license agreement from NVIDIA CORPORATION or
-# its affiliates is strictly prohibited.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # Long-running GPU tests (20+ min each): statistical validation,
 # multi-orientation inference, LER regression, and full-epoch training.

.github/workflows/pr_file_check.yaml

@@ -1,12 +1,17 @@
 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-# SPDX-License-Identifier: LicenseRef-NvidiaProprietary
+# SPDX-License-Identifier: Apache-2.0
 #
-# NVIDIA CORPORATION, its affiliates and licensors retain all intellectual
-# property and proprietary rights in and to this material, related
-# documentation and any modifications thereto. Any use, reproduction,
-# disclosure or distribution of this material and related documentation
-# without an express license agreement from NVIDIA CORPORATION or
-# its affiliates is strictly prohibited.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 name: Check for Large Files and Restricted Extensions
 
 on:

Dockerfile

@@ -1,5 +1,17 @@
 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-# SPDX-License-Identifier: LicenseRef-NvidiaProprietary
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # Pre-decoder training image.
 #

LICENSE

@@ -1,3 +1,4 @@
+Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 
                                  Apache License
                            Version 2.0, January 2004

code/scripts/spdx_headers.py

@@ -67,7 +67,7 @@
 
 # Old proprietary license bodies (year-agnostic, used for replacement)
 _OLD_HASH_BODY = (
-    "# SPDX-License-Identifier: Apache-2.0\n"
+    "# SPDX-License-Identifier: LicenseRef-NvidiaProprietary\n"
     "#\n"
     "# NVIDIA CORPORATION, its affiliates and licensors retain all intellectual\n"
     "# property and proprietary rights in and to this material, related\n"
@@ -226,6 +226,11 @@ def _has_header(content: str) -> bool:
     return "SPDX-FileCopyrightText" in prefix
 
 
+def _has_apache_license(content: str) -> bool:
+    prefix = "\n".join(content.splitlines()[:20])
+    return "SPDX-License-Identifier: Apache-2.0" in prefix
+
+
 def _apply_header(path: Path, header: str, style: str) -> bool:
     raw = path.read_text(encoding="utf-8")
 
@@ -259,7 +264,9 @@ def _apply_header(path: Path, header: str, style: str) -> bool:
 def main() -> int:
     parser = argparse.ArgumentParser(description="Add or check SPDX headers.")
     parser.add_argument(
-        "--check", action="store_true", help="Fail if any files are missing headers."
+        "--check",
+        action="store_true",
+        help="Fail if any files are missing headers or use a non-Apache-2.0 license.",
     )
     parser.add_argument(
         "--root",
@@ -271,6 +278,7 @@ def main() -> int:
 
     year = dt.datetime.now().year
     missing = []
+    wrong_license = []
     updated = []
 
     for path in sorted(_iter_files(args.root)):
@@ -282,6 +290,8 @@ def main() -> int:
             raw = path.read_text(encoding="utf-8")
             if not _has_header(raw):
                 missing.append(path.relative_to(args.root))
+            elif not _has_apache_license(raw):
+                wrong_license.append(path.relative_to(args.root))
         else:
             if _apply_header(path, header, style):
                 updated.append(path.relative_to(args.root))
@@ -290,8 +300,12 @@ def main() -> int:
         if missing:
             missing_str = "\n".join(f"- {path}" for path in missing)
             print("Missing SPDX headers:\n" + missing_str)
+        if wrong_license:
+            wrong_str = "\n".join(f"- {path}" for path in wrong_license)
+            print("SPDX headers without 'SPDX-License-Identifier: Apache-2.0':\n" + wrong_str)
+        if missing or wrong_license:
             return 1
-        print("All checked files have SPDX headers.")
+        print("All checked files have Apache-2.0 SPDX headers.")
         return 0
 
     if updated:

code/tests/test_dataloader_multiprocessing.py

@@ -1,12 +1,17 @@
 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-# SPDX-License-Identifier: LicenseRef-NvidiaProprietary
+# SPDX-License-Identifier: Apache-2.0
 #
-# NVIDIA CORPORATION, its affiliates and licensors retain all intellectual
-# property and proprietary rights in and to this material, related
-# documentation and any modifications thereto. Any use, reproduction,
-# disclosure or distribution of this material and related documentation
-# without an express license agreement from NVIDIA CORPORATION or
-# its affiliates is strictly prohibited.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 """
 Multi-worker DataLoader tests for the Stim inference datapipe.
 

conf/config_pre_decoder_memory_surface_model_1_d9.yaml

@@ -1,5 +1,17 @@
 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-# SPDX-License-Identifier: LicenseRef-NvidiaProprietary
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 exp_tag: pre-decoder # The shell script always overrides this with "${EXPERIMENT_NAME}"
 output: outputs/${exp_tag} # Main output directory.

conf/config_qec_decoder_r13_fp8.yaml

@@ -1,5 +1,17 @@
 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-# SPDX-License-Identifier: LicenseRef-NvidiaProprietary
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # Config for: Ising-Decoder-SurfaceCode-1-Accurate (R=13), aka Model 4 from the corresponding paper, depolarizing p=0.006, experiment qec-decoder-depolarizing-r13-fp8.
 # Training uses receptive field 13; evaluation targets distance/n_rounds 13.

conf/config_qec_decoder_r9_fp8.yaml

@@ -1,5 +1,17 @@
 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-# SPDX-License-Identifier: LicenseRef-NvidiaProprietary
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # Config for: Ising-Decoder-SurfaceCode-1-Fast (R=9), aka Model 1 from the corresponding paper, depolarizing p=0.006, experiment qec-decoder-depolarizing-r9-fp8.
 # Training uses receptive field 9; evaluation targets distance/n_rounds 9.

conf/config_v3_timing_test.yaml

@@ -1,12 +1,17 @@
 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-# SPDX-License-Identifier: LicenseRef-NvidiaProprietary
+# SPDX-License-Identifier: Apache-2.0
 #
-# NVIDIA CORPORATION, its affiliates and licensors retain all intellectual
-# property and proprietary rights in and to this material, related
-# documentation and any modifications thereto. Any use, reproduction,
-# disclosure or distribution of this material and related documentation
-# without an express license agreement from NVIDIA CORPORATION or
-# its affiliates is strictly prohibited.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # Timing check config for v3 (Torch HE) branch.
 # Timing test: d=5, n_rounds=5, 25-param noise model (p=0.006).