Best AI code generation plugin?

I've been leaning pretty heavily on ChatGPT to write an app using a couple of frameworks I've never used before. I'm treating it as an experiment, I know I'm not learning as much as I could, but it's been fun.

I find myself writing

I have file2.js

(paste code here)

And file2.js

(paste code here)

How do I do the thing?

Is there a vscode plugin which has access to all the files in my workspace (or all the open files in my editor) so that I can just refer to them by filename?

How do I do the thing in file1.js and file2.js

That's nirvana, if that's not a thing, then I'm open to hearimg about other good options.