If you use Claude Code and you need to repeat things over and over, this means you are not using CLAUDE.md properly in your repository; it's that simple, CLAUDE.md governs your claude behavior, if its empty or too long with tons of documentation, you are doing it wrong. use /init on your repository !
If/when you need to add something to it, make sure its chirurgical, no need to paste a book into that file, you can @ reference to other files in the repo if needed at the end of CLAUDE.md, this is how you can layer more context about your code base without bloating your context session with EVERYTHING Claude need to know.