Comment by andai

Claude Code spends most of its time poking around the files. It doesn't have any knowledge of the project by default (no file index etc), unless they changed it recently.

When I was using it a lot, I created a startup hook that just dumped a file listing into the context, or the actual full code on very small repos.

I also got some gains from using a custom edit tool I made which can edit multiple chunks in multiple files simultaneously. It was about 3x faster. I had some edge cases where it broke though, so I ended up disabling it.