Comment by sdevonoes

Just go the old way. You will save a lot of time, and gain a lot of knowledge.

In my company we have tried using claude for exactly the same task you have. The results were bad. We discovered a few interesting things, but most of the stuff was wrong: we had to dif through the code base the old way to confidently accept/reject what Claude was telling us. So we could have save a lot of time and money simply by doing it ourselves. As an upside we also learned about the codebase so now people rely on us for that (that feels good too)