example

+     "scripts": {
+         "foo": "ls",

#by itself the command works
$ composer foo
> ls
 app ...
 
#it accepts arguments ok, as long as they are not composer arguments
$ composer foo -- -l
> ls '-l'
total 512
drwxrwxr-x  9 rubin rubin   4096 Dec 20 15:17  app
 
# ls -d shows directories only, instead composer is expecting a working directory argument
$ composer foo -- -d
                                                         
  [RuntimeException]                                     
  Invalid working directory specified,  does not exist.