I recently took a job maintaining and extending the functionality of an enterprise Enterprise Asset Management product through its own scripting and xml-soup ecosystem. Since it is such a closed system with a much smaller dataset of documentation and examples, it has been great at using what it does know to help me navigate and understand the product as a whole, and how to think of things in regard to how this product works behind the scenes in the code I cannot see.

It doesn't write the code for me, but I talk to it like it is a personal technical consultant on this product and it has been very helpful.