In the GitHub releases section ...eventually
May not work like this on Windows, but you'll figure it out
./gradlew sDecW idea
Then install the scala plugin for IntelliJ and open the project.
When merging a pull request we require you to sign the last (or ideally all) commit done on a branch before opening the pull request. If not all commits are signed you take full responsibility for all unsigned commits, even if someone else did them.
Main development branch
Stable branch for appropriate Minecraft version
Feature develpment branch