I liked Claude Code when I used it initially to document a legacy codebase. The developer who maintains the system reviewed the documentation, and said it was spot-on.

But the other day I asked it to help add boundary logging to another legacy codebase and it produced some horrible, duplicated and redundant code. I see these huge Claude instruction files people share on social media, and I have to wonder...

Not sure if they're rationing "the smarts" or performance is highly variable.