Contributions to the seL4 kernel repository are welcome!
Please note that GD and Data61 require a contributor license agreement (CLA) to be signed for all external contributions. Please see  for details (it is a fairly short and standard CLA).
seL4/seL4 repository, we can review pull requests directly on
github if we have a signed CLA on file.
If you have only small trivial changes such as style, typos, comments, or white space and don't want to sign a CLA for that, please file an issue in the github issue tracker, we'll usually be happy to do the change ourselves and attribute your idea by linking to the github issue in the change set comment.
In addition to our guidelines, the kernel has additional history requirements:
Generally, any contributions should pass the tests in the project
https://github.com/seL4/sel4test. If new features or platforms are added,
they should add corresponding tests in
master should additionally either be invisible to the
proof in https://github.com/seL4/l4v, such as comments, documentation, style,
unverified platform, etc, or they should come with proof updates to
If you have larger changes or additions, it might be a good idea to get in contact with us as email@example.com, so we can help you get started.