Add a PR template + contributing.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,9 @@
+## Checklist
+
+- [ ] Read CONTRIBUTING.md, and accept the CLA by including the provided snippet. We will not accept PR without this.
+- [ ] Run pre-commit hook.
+- [ ] If you changed Rust code, run `cargo check`, `cargo clippy`, `cargo test`.
+
+## PR Description
+
+<!-- Description for the PR -->

CONTRIBUTING.md

@@ -0,0 +1,58 @@
+# Contributing to Delayed-Streams-Modeling
+
+## Pull Requests
+
+Delayed-Streams-Modeling is the implementation of a research paper.
+Therefore, we do not plan on accepting many pull requests for new features.
+However, we certainly welcome them for bug fixes.
+
+1. Fork the repo and create your branch from `main`.
+2. If you have changed APIs, update the documentation accordingly.
+3. Ensure pre-commit hooks pass properly, in particular the linting and typing.
+4. When changing the Rust code, run `cargo check`, `cargo clippy`, `cargo test`.
+5. Accept the Contributor License Agreement (see after).
+
+Note that in general, we will not accept refactoring of the code.
+
+
+## Contributor License Agreement ("CLA")
+
+In order to accept your pull request, we need you to submit a Contributor License Agreement.
+
+If you agree with the full CLA provided in the next paragraph, copy the following statement in your PR, changing your Github Handle:
+
+> I, {your GitHub handle}, confirm that I have read and understood the terms of the CLA of Kyutai-labs, as outlined in the repository's CONTRIBUTING.md, and I agree to be bound by these terms.
+
+The full CLA is provided as follows:
+
+> I, {your GitHub handle}, hereby grant to Kyutai-labs a perpetual, worldwide, non-exclusive, royalty-free,
+> irrevocable license to use, modify, distribute, and sublicense my Contributions.
+
+> I understand and accept that Contributions are limited to modifications, improvements, or changes
+> to the project’s source code submitted via pull requests. I accept that Kyutai-labs has full discretion to
+> review, accept, reject, or request changes to any Contributions I submit, and that submitting
+> a pull request does not guarantee its inclusion in the project.
+
+> By submitting a Contribution, I grant Kyutai-labs a perpetual, worldwide license to use, modify,
+> reproduce, distribute, and create derivative works based on my Contributions.
+> I also agree to assign all patent rights for any inventions or improvements that arise from my Contributions,
+> giving the Kyutai-labs full rights to file for and enforce patents.
+> I understand that the Kyutai-labs may commercialize, relicense, or exploit the project and my Contributions without further notice or obligation to me.
+> I confirm that my Contributions are original and that I have the legal right to grant this license.
+> If my Contributions include third-party materials, I will ensure that I have the necessary permissions
+> and will disclose this information. I accept that once my Contributions are integrated, they may be altered or removed at the Kyutai-labs’s discretion.
+
+> I acknowledge that I am making these Contributions voluntarily and will not receive any compensation.
+> Furthermore, I understand that all Contributions, including mine, are provided on an "as-is" basis, with no warranties.
+> By submitting a pull request, I agree to be bound by these terms.
+
+## Issues
+
+Please submit issues on our Github repository.
+
+## License
+
+By contributing to Delayed-Streams-Modeling, you agree that your contributions
+will be licensed under the LICENSE-* files in the root directory of this source
+tree. In particular, the rust code is licensed under APACHE, and the python code
+under MIT.