The most important part of language tooling for me is reproducability. I should be able to do the following to any project: git clone <project name> && cd

The most important part of language tooling for me is reproducability. I should be able to do the following to any project: git clone <project name> && cd <project name> <build tool> build And have it fetch all of that projects dependencies, and then build the entire system. Anything that requires machine-wide package installation is immediately disqualified (user-wide package installation is almost as bad).