It uses a projectional editor, so there is only one way of "formatting" the code and no need for a linter. The typesystem is very powerful and allows a language engineer to create arbitrary checks on the language which are executed inside the IDE.

I have not tried building a debugger for a DSL in MPS, but it might be achievable, at least if you're targeting Java as a generated language.

Build integration is available for Maven and Gradle.