You are right, we aren't 100% compatible right now. Please track the issues on the Yarn GitHub repo that you linked or better yet: help us fix it. This is a community project and we are excited for the community to jump in and help us out and complete the few missing pieces.

I agree local development with many packages can be hard. For Jest we adopted `lerna`

See https://github.com/facebook/jest and https://github.com/lerna/lerna which makes cross-package development in a mono-repo a lot of fun. Maybe that solution will work for you?