I was actually recently thinking about similar idea. I am someone who started coding post LLMs and have basic technical understanding. I know what loops, variables, API, backend bla bla is. I learned bunch more since then but I am not capable of making decisions based on git diff alone. And I want to. I want to because I think increasing my skills is still super important, even in AI era. The models are getting better, but are still limited by their core design -- for now it does not seem like they will replace humans.

So getting assistance in the review, in making the decisions and giving me more clarity feels interesting.

Maybe its people like me, who became involved into coding after the LLMs who might be your niche.

One thing I dont understand, the UI/UX? Is this visible only on git itself? Or can I get it working in Codex?