composer.json

{
  "name": "phpcs/example",
	"repositories": [
		{
			"type": "git",
			"url": "git://github.com/radmiraal/TYPO3Flow.git"
		},
		{
			"type": "git",
			"url": "git://github.com/radmiraal/TYPO3SniffPool.git"
		}
	],
	"config": {
		"vendor-dir":"Packages/Libraries",
		"bin-dir": "bin"
	},
	"require": {
		"php": ">=5.4.0"
	},
	"require-dev": {
		"typo3-qa/typo3flow": "dev-master"
	},
	"minimum-stability": "dev"
}

test.php

<?php
  if(true) { }
?>

usage.bash

$ composer install --dev
Loading composer repositories with package information
Installing dependencies                                           
Nothing to install or update
Loading composer repositories with package information
Installing dev dependencies
  - Installing squizlabs/php_codesniffer (dev-master e5bc3c5)
    Cloning e5bc3c52027e23faa58b6f1b2c98829c6b5ee93f

  - Installing typo3-qa/typo3pool (dev-master 5d5e706)
    Cloning 5d5e706e77766911e8addd7d2645827266c7a6cb

  - Installing typo3-qa/typo3flow (dev-master 330d885)
    Cloning 330d88501ac20cdc27137e864c6890f94e8c70ac

$ bin/phpcs --standard=Packages/Libraries/typo3-qa/typo3flow test.php 

FILE: /Users/rens/Documents/_Sites/flow/ehrm/Data/tmp/test.php
--------------------------------------------------------------------------------
FOUND 3 ERROR(S) AND 1 WARNING(S) AFFECTING 1 LINE(S)
--------------------------------------------------------------------------------
 2 | WARNING | Avoid IF statements that are always true or false
 2 | ERROR   | Empty IF statement detected
 2 | ERROR   | Expected "if (...) {\n"; found "if(...) { "
 2 | ERROR   | TRUE, FALSE and NULL must be uppercase; expected "TRUE" but
   |         | found "true"
--------------------------------------------------------------------------------