If you code with Claude, you’ve probably seen this happen. You ask Claude Code to fix one thing, only to find that yesterday’s working code is now broken in three new places.
Nothing told Claude what to leave alone. One file does, and if you master it, you’ll be better off than most Claude coders. I’ll show you how to set up your Claude Code project like a pro. Below is a map of every file in the folder, and a free template you can fill in before your next session.