It was GitLab Duo.

We definitely have better tools for things like syntax checking and a linter step in the CI/CD pipeline has the advantage of not burning down a whole forest to do its job.

I made a contribution to a project that is using AI generated reviews and the AI bot gave me something like five or six suggestions, every one of which was wrong in some way or another. Only one of the suggestions was worth considering and the code that it generated to implement that suggestion was bad to the point of being baffling.