If you use a Mac, APFS let's you do `cp -c` which lets you create a "copy-on-write" file, meaning if you don't write to it, you don't copy it.
Multiple Claude Code instance isolation…
If you use a Mac, APFS let's you do `cp -c` which lets you create a "copy-on-write" file, meaning if you don't write to it, you don't copy it.