James, that was my understanding also, positional arguments are not supported. What’s interesting is that’s the main reason I used it, since most of my parameters are optional. You should check out Oakton, it supports positional by default, which is why I ended up not using it since it requires more setup. You’d think it would be easy for System.CommandLine to add positional, especially since it can be configured to call a method with DragonFruit which would naturally be positional.