zlacker

It works great on adding stuff to an already established codebase. Things like “we have these search parameters, also add foo”. Remove anything related to x…

>>eknkc+(OP)
Exactly. If you can give it a contract and a context, essentially, and it doesn't need to write a large amount of code to fulfill it, it can be great.

I just used it to write about 80 lines of new code like that, and there's no question it saves time.