I use https://jules.google.

The UI is obviously vibe-coded garbage but the underlying system works. And most of the time you don't have to open the UI after you've set it running you just comment on the Github PR.

This is clearly an unloved "lab" project that Google will most likely kill but to me the underlying product model is obviously the right one.

I assume Microsoft got this model right first with the "assign issue to Copilot" thing and then fumbled it by being Microsoft. So whoever eventually turns this <correct product model> into an <actual product that doesn't suck> should win big IMO.