custom-wp-roles.php

<?php
$user_roles_option_name = 'custom-user-roles-version';
$user_roles_version = '0.1.0';
$user_roles_current_version = get_option($user_roles_option_name);

if ($user_roles_current_version && version_compare($user_roles_current_version, $user_roles_version) >= 0) {
    return;
}

error_log('NOTE: USER CAPABILITIES UPDATE');
update_option($user_roles_option_name, $user_roles_version);

// add_role(...);