Yep and it collapses in the enterprise. The code you’re referencing might well be from some niche vendor’s bloated library with multiple incoherent abstractions, etc. Context is necessarily big
I tried copy-pasting all the relevant parts into ChatGPT and gave it instructions like "add support for X to Y, similar to Z", and it got it pretty well each time. The bottleneck was really pasting things into the context window, and merging the changes back. So, I made a GUI that automated it - showed links on top of functions/classes to quickly attach them into the context window, either as just declarations, or as editable chunks.
That worked faster, but navigating to definitions and manually clicking on top of them still looked like an unnecessary step. But if you asked the model "hey, don't follow these instructions yet, just tell me which symbols you need to complete them", it would give reasonable machine-readable results. And then it's easy to look them up on the symbol level, and do the actual edit with them.
It doesn't do magic, but takes most of the effort out of getting the first draft of the edit, than you can then verify, tweak, and step through in a debugger.