This kind of approach might be what (finally) unlocks visual programming?
I feel like most good programmers are like good chess players. They don't need to see the board (code). But for inputting the code transformation into the system this might be a good programmer's chessboard.
Though to make it work concretely for arbitrary codebases I feel like a coding agent behind the scenes is 100% required.
As a bonus, porting Doom to it should be "trivial".
A specific type or area of developers, I'd say. There are many types and not all of them require understanding sizeable code bases to do their work well.
Done right, you may not know specific lines or chunks of code by heart, but much like a tuned-in company CEO, you have eyes and ears on the ground and retain global oversight and insight of the project itself. For specifics, you can learn what you need as you need it. If that means knowing how every single module works, that's just a conversation with your agent.