first try

blocks-register.php

@@ -0,0 +1,21 @@
+<?php
+// Exit if accessed directly.
+if ( ! defined( 'ABSPATH' ) ) {
+	return;
+}
+
+function ssi_register_space_status_block() : void {
+	$asset_path = plugin_dir_path( __FILE__ ) . 'build/space-status';
+	register_block_type( $asset_path, [
+		'render_callback' => 'ssi_render_block',
+	] );
+}
+add_action( 'init', 'ssi_register_space_status_block' );
+
+/**
+ * Server‑side markup for the block.
+ */
+function ssi_render_block( array $attributes, string $content ) : string {
+	// Re‑use existing helper & CSS class logic.
+	return ssi_shortcode();
+}