Are you using AI for public contributions? Or a private repo? How does it deal with things like project conventions? e.g. "Currency should be represented using a Money class", "This method should use our utility class", etc. Do you upload the entire project's source code?
Yeah I've heard of uploading entire repos several times now and I'm really surprised there isn't more concern about this. Prior to this, the thought of any developer uploading source code to any 3rd party would likely result in a bad outcome for that employee. And now we have juniors through seniors uploading not only single classes but entire projects. I suppose it's one thing if the company has some sort of corporate account with an AI partner and you login with your company credentials. But I doubt this is the case for most devs.
The review you get depends what questions you ask. For example: I wrote a class that wrapped a std::vector<T> as a private data member and it pointed out that it would be nice if I implemented support for accessing the iterators and the array subscripts. It made these remarks based on how I was using the object. I have uploaded an entire repo to Gemini (as a single file) and asked for broad and fine reviews. It's really quite good.