visual studio code: settings by User, Workspace, or Folder...

It's a powerful and easy to use idea once you know the trick, but it's easy to miss at first: customizations in VS Code are "by user" by default, but you can do it "by workspace":

In this case, I'm doing more work across packages (including mockup companies "PurpleCo" and "GreenCo") and setting a color theme that reminds me which space I'm in is great.  ("Quite Light" is my usual go-to.... and I still wish "Dark Modes" weren't quite so popular, for folks with astigmatism it's a world of dancing after images.)