How far are we from a codebase-wide IDE integration that submits pull requests?

I'm wondering if anyone is building or how far are we from an extension or integration that takes your whole codebase and identifies bugs and submits pull-requests that you can review.

I know some people are working on AI agents using GPT4. I've also been using Cursor and it's pretty good. But it has its limits. I'm not sure whether Copilot X will be able to do that.

Curious about when this will be possible.