GitHub Repositories
You can use the code from these repositories to experiment, test, build, create patches, issue pull requests, etc.
https://github.com/jakartaee/platform-tck - Project repository hosted on GitHub.
https://github.com/eclipse-ee4j/debugging-support-for-other-languages-tck - Project repository hosted on GitHub.
https://github.com/eclipse-ee4j/jakartaee-tck-tools - Project repository hosted on GitHub.