woocommerce/packages/js/extend-cart-checkout-block/$slug.php.mustache

<?php
/**
 * Plugin Name:     {{title}}
{{#description}}
 * Description:     {{description}}
{{/description}}
 * Version:         {{version}}
{{#author}}
 * Author:          {{author}}
{{/author}}
{{#license}}
 * License:         {{license}}
{{/license}}
{{#licenseURI}}
 * License URI:     {{{licenseURI}}}
{{/licenseURI}}
 * Text Domain:     {{textdomain}}
 *
 * @package         {{namespace}}
 */
add_action('woocommerce_blocks_loaded', function() {
    require_once __DIR__ . '/{{slug}}-blocks-integration.php';
	add_action(
		'woocommerce_blocks_cart_block_registration',
		function( $integration_registry ) {
			$integration_registry->register( new {{slugPascalCase}}_Blocks_Integration() );
		}
	);
	add_action(
		'woocommerce_blocks_checkout_block_registration',
		function( $integration_registry ) {
			$integration_registry->register( new {{slugPascalCase}}_Blocks_Integration() );
		}
	);
});

/**
 * Registers the slug as a block category with WordPress.
 */
function register_{{slugPascalCase}}_block_category( $categories ) {
    return array_merge(
        $categories,
        [
            [
                'slug'  => '{{slug}}',
                'title' => __( '{{slugPascalCase}} Blocks', '{{slug}}' ),
            ],
        ]
    );
}
add_action( 'block_categories_all', 'register_{{slugPascalCase}}_block_category', 10, 2 );