I use Dagger as well, since v0.1.2, even worked on the CUE stuff around then with them.

I wouldn't call it a CI system though, but certainly the philosophy that local and CU should be running the same thing saves many hours of frustration.

I'm currently using Dagger to create forkable/rewindable agent sessions and environments (not with their agent nonsense). Dagger is a pretty sweet piece of tech, so many uses for programmatic container layers