All development of Spacewalk happens in the community and out in the open. Communication between developers occurs on the development mailing list and in IRC, documentation is stored on our wiki, and our source code repository and all changes to it are publicly available.
The Spacewalk developer wiki is our main source of developer documentation, notes, and planning documents. If you'd like to be able to contribute to our wiki, you'll need a GitHub account. You can submit Pull request to spacewalkproject/spacewalk-wiki repository. More details can be found here.