It doesn't need to be AGI. It just needs to control a repository of code better than interns. Much easier job.
Discussion
Yes .. but then you will have thousands of repos .. in all you will still need to spend more hours on code :-) and you will need more people .. nothing wrong .. it is just the nature of progress ☺️
Better roads lead to more accidents ( in absolute numbers ) because more cars show up and they try to drive lot faster ...