>I’m using models to work on frameworks with nearly zero preexisting examples to train on

Zero preexisting examples of your particular frameworks.

Huge number of examples of similar existing frameworks and code patterns in their training set though.

Still not a novel thing in any meaningful way, not any more than someone who has coded in dozens of established web frameworks, can write against an unfamiliar to them framework homegrown at his new employer.

Yeah. I work with bleeding edge zig. If you just ask Claude to write you a working tcp server with the new Io api, it doesn’t have any idea what it’s doing and the code doesn’t compile. But if you give it some minimal code examples, point it to the recent blog posts about it, and paste in relevant points from std it does incredibly well and produce code that it has not been trained on.