gistfile1.php

<?php

class MyLib extends \Phalcon\Di\InjectionAware
{
    private $filename;
    
    public function __construct(\Phalcon\DiInterface $di)
    {
        $this->setDI($di);
        $this->filename = $this->getDI()->get('config')->daemon->hb_filename;
    }
}

// ------------------------
$di->set('mylib', function() use ($di) {
   return new MyLib($di); 
});

// ------------
$di->getShared('mylib');  // shared version of the class, for all intents and purposes a singleton.