# Contributions Welcome! Contributions to the seL4 kernel repository are welcome! ## Kernel Development Process In addition to our general [contribution guidelines][1], the kernel has additional git history requirements: * Please try to make sure every commit is in a working state to facilitate bisecting. + unless there is a concrete reason, if so please state that reason in the commit message. * Try to keep commits small for ease of reviewing. [1]: https://docs.sel4.systems/Contributing ## Build/Test Generally, any contributions should pass the tests in the project . If new features or platforms are added, they should add corresponding tests in `sel4test`. Contributions to `master` should additionally either be invisible to the proof in , such as comments, documentation, style, unverified platform, etc, or they should come with proof updates to `l4v`. ## Contact If you have larger changes or additions, it is a good idea to get in contact with us as , so we can help you get started. The people responsible for the technical direction, procedures, and quality control are the [Technical Steering Committee][2] (TSC) of the seL4 foundation. You can contact them either on the developer mailing list or on directly via email available from their profile pages. [2]: https://sel4.systems/Foundation/TSC ## Developer Certificate of Origin (DCO) This repository uses the same sign-off process as the Linux kernel. For every commit, use git commit -s to add a sign-off line to your commit message, which will come out as: Signed-off-by: name By adding this line, you make the declaration that you have the right to make this contribution under the open source license the files use that you changed or contributed. The full text of the declaration is at .