--- /dev/null
+<?php
+
+/*
+ * This file is part of the Behat Testwork.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Behat\Testwork\Cli;
+
+use Symfony\Component\Console\Command\Command as SymfonyCommand;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Represents Testwork Console Controller.
+ *
+ * All testwork console controllers should implement this interface.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+interface Controller
+{
+ /**
+ * Configures command to be executable by the controller.
+ *
+ * @param SymfonyCommand $command
+ */
+ public function configure(SymfonyCommand $command);
+
+ /**
+ * Executes controller.
+ *
+ * @param InputInterface $input
+ * @param OutputInterface $output
+ *
+ * @return null|integer
+ */
+ public function execute(InputInterface $input, OutputInterface $output);
+}