The documented API for defining a sub-command is:

  program
    .command('setup')
    .description('run remote setup commands')
    .action(function(){
      console.log('setup');
    });

This does not automatically call addImplicitHelpCommand. The undocumented form

 program.command('setup', 'run remote setup commands')

does. It would seem reasonable to move the code that sets the executables flag, which in turn causes addImplicitHelpCommand to be called, from the parse method into the description method. Would a patch to do this be acceptable?