Extending core class IncomingRequest

I think all you need to do is add the proper "use" clause into /app/Config/Services.php
The top part of the file should look like this

PHP Code:

<?php namespace Config;

use CodeIgniter\Config\Services as CoreServices;
use CodeIgniter\Config\BaseConfig;

//add the following
use App\Libraries\IncomingRequest;

require_once SYSTEMPATH . 'Config/Services.php';

class Services extends CoreServices 


Everything else in the file remains as you show it above. That all looks good to me.