Comment by gwd

For me, in just the golang server instance and the core functional package, `cloc` reports over 40k lines of code, not counting other supporting packages. I spent the last week having Claude rip out the external auth system and replace it with a home-grown one (and having GPT-codex review its changes). If anything, Claude makes it easier on me as a solo founder with a large codebase. Rather than having to re-familiarize myself with code I wrote a year ago, I describe it at a high level, point Claude to a couple of key files, and then tell it to figure out what it needs to do. It can use grep, language server, and other tools to poke around and see what's going on. I then have it write an "epic" in markdown containing all the key files, so that future sessions already know the key files to read.

I really enjoyed the process. As TFA says, you have to keep a close eye on it. But the whole process was a lot less effort, and I ended up doing mor than I would otherwise have done.