does this work for multiple levels?

Thanks! Surprisingly, I didn't see this documented anywhere

Add '/' , like you would with a file system.
Task.init(project_name='main_project/sub_project', task_name='test')

does this work for multiple levels?

Yep 😄

It's a known fact that documentation always trail features by 3-6 months 😄 We're working on new docs, should be released this week 🙂