An example of using the `setMODX()` method I'm proposing for Teleport

teleport-test-set-modx.php

<?php
require __DIR__ . '/config.core.php';
require MODX_CORE_PATH . 'model/modx/modx.class.php';

$modx = new modX();

$modx->initialize('mgr');

require __DIR__ . '/src/bootstrap.php';

define('TELEPORT_BASE_PATH', rtrim(getcwd(), DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR);

try {
    $teleport = Teleport\Teleport::instance([
        'profile_name' => 'site',
        'profile_code' => 'site'
    ]);

    $profileStream = $teleport->setMODX($modx);

    $request = $teleport->getRequest('Teleport\Request\Request');
    $request->handle([
        'action' => 'Extract',
        'profile' => $profileStream,
        'tpl' => 'tpl/settings.tpl.json'
    ]);

    echo implode(PHP_EOL, $request->getResults()) . PHP_EOL;
} catch (Exception $e) {
    echo $e->getMessage() . PHP_EOL;
}