wp-cli Bricks Code Signing - save in mu-plugins folder

bicks-code-signing.php

<?php
namespace Bricks;

class MWE_BRICKS_SIGN_CODE
{
    public function __construct() {
        if (defined('WP_CLI') && WP_CLI) {
            // https://make.wordpress.org/cli/handbook/references/internal-api/wp-cli-add-command/
            \WP_CLI::add_command('bricks', '\Bricks\MWE_BRICKS_SIGN_CODE');
        }
    }

    public function sign_code()
    {
        // Add option table entry with version & timestamp of last code signature generation
        update_option(BRICKS_CODE_SIGNATURES_LAST_GENERATED, BRICKS_VERSION);
        update_option(BRICKS_CODE_SIGNATURES_LAST_GENERATED_TIMESTAMP, time());

        $success = Admin::crawl_and_update_code_signatures();

        if ($success) {
            // Regenerate CSS files if 'file' is set
            if (Database::get_setting('cssLoading') === 'file') {
                Assets_Files::regenerate_css_files();
            }

            \WP_CLI::log('DONE! Code signatures regenerated successfully.');
        }
        else {
            \WP_CLI::log('Something went wrong.');
        }

    }
}

new MWE_BRICKS_SIGN_CODE();

Thank you @mickaelperrin