commanderTest.js

var commander = require('commander');
commander.version('0.0.1').command('new');
commander.parse(process.argv);
console.log(commander.commands);

var matches = commander.commands.filter(function(c){
  return c._name == commander.args[0];
});

if (!matches.length
    && commander.args.length <= 1
    && typeof commander.args[0] === 'string') {
 console.error('Argument ' + commander.args[0] + ' not recognized.');
}