@castelao This is ready for review. A big PR so you don't need to go into details but maybe glancing at the GHA filer and the docs updates would be good

I'm working on this review but wanted to share a thought before finishing it. For the edge case that we discussed today, would a simple pixi -e <env> install would resolve the issue? Even with the cache and not touching pyproject.toml, would it 're-install' COMPASS since it is in editable mode?

Yea actually that's a good idea. I will go ahead and add that