kagg-design/add-xdebug-cookie-to-cron-request.php

## add-xdebug-cookie-to-cron-request.php
<?php
/**
 * Add xDebug cookie to cron request mu-plugin.
 *
 * @package kagg
 */

/**
 * Add xDebug cookie to cron request
 *
 * @param array $args Args.
 *
 * @return array
 */
function add_xdebug_cookie_to_cron_request( array $args ) {
	if ( empty( $_COOKIE['XDEBUG_SESSION'] ) ) {
		return $args;
	}

	$args['args']['cookies']['XDEBUG_SESSION'] = $_COOKIE['XDEBUG_SESSION'];

	return $args;
}

add_action( 'cron_request', 'add_xdebug_cookie_to_cron_request' );