diff --git a/src/codegen.inc.php b/src/codegen.inc.php
index ba19a31..66fab35 100644
--- a/src/codegen.inc.php
+++ b/src/codegen.inc.php
@@ -2,7 +2,23 @@
 namespace metagen_cs;
 use Exception;
 
-function get_twig(array $inc_path = [])
+function codegen(?string $cache_dir, \mtgMetaInfo $meta, array $options = []) : string
+{
+  $twig = get_twig();
+
+  if(!empty($cache_dir))
+    $twig->setCache($cache_dir);
+
+  $twig->addGlobal('meta', $meta);
+
+  $options['meta'] = $meta;
+  if(!isset($options['namespace']))
+    $options['namespace'] = 'BitGames.Autogen';
+
+  return $twig->render('codegen_bundle.twig', $options);
+}
+
+function get_twig(array $inc_path = []) : \Twig\Environment
 {
   array_unshift($inc_path, __DIR__ . "/../tpl/");
   $loader = new \Twig\Loader\FilesystemLoader($inc_path);
@@ -19,7 +35,7 @@ function get_twig(array $inc_path = [])
   return $twig;
 }
 
-function supported_tokens()
+function supported_tokens() : array
 {
   return [
     'POD',