About user permission of the admin ui, is it possible to scope user based on project? For example, if user A isn’t in project B, he isn't allowed to change toggle value in project B.

Not yet. We're working on more fine grained permission controls soon.

Do you accept PRs if we want to contribute sth that both sides want?

Yeah, definitely. For fine grained permissions it would be great to meet first to make sure we're on the same page and covering all the use cases.

Make sense. My ask is in general not specific to user permission. Will definitely align if we want to contribute