public_index.php

<?php

//...

$di->set('annotations', function(){
    //In development mode the memory adapter could be used
    //it will read the annotations every time requested
    //other adapter would store the parsed annotations in files/shared memory, etc
    return new Phalcon\Annotations\Adapter\Memory();
});

$di->set('router', function() {

    //Use the annotations router
    $router = new \Phalcon\Mvc\Router\Annotations();

    //This always read routes from RobotsController
    //This will autoload that class and automatically will create the routes based 
    //on its annotations
    $router->addResource('Robots');

    //This will do the same as above but only if the handled uri starts with /robots
    $router->addResource('Robots', '/robots');

    return $router;
});

RobotsController.php

<?php

/**
 * @RoutePrefix("/robots")
 */
class RobotsController extends Phalcon\Mvc\Controller
{

	/**
	 * @Get("/")
	 */
	public function indexAction()
	{

	}

	/**
	 * @Get("/edit/{id:[0-9]+}", name="edit-robot")
	 */
	public function editAction($id)
	{

	}

	/**
	 * @Route("/save", methods={"POST", "PUT"}, name="save-robot")
	 */
	public function saveAction()
	{

	}

}