Starting from LSP sample code for Visual Studio Code, we developed a couple of tools for Wollok using Language Server Protocol (for Visual Studio Code, IntelliJ, Eclipse, Atom, etc.)
Here you can see how to develop a Wollok example using autocompletion tools. Once you have defined your objects and classes, you can test it in the REPL using a dynamic diagram:
Do you want to contribute? Great, you are always welcome!