Inline class route prefix to all method routes, to make single explicit source for route paths
 use Symfony\Component\Routing\Annotation\Route;
 /**
- * @Route("/api", name="api_")
+ * @Route(name="api_")
  */
 class SomeController
 {
     /**
-     * @Route("/action")
+     * @Route("/api/action")
      */
     public function action()
     {
     }
 }
                        Configure your rector.php:
<?php
use Rector\Config\RectorConfig;
use Rector\Symfony\CodeQuality\Rector\Class_\InlineClassRoutePrefixRector;
return RectorConfig::configure()
    ->withRules([
        InlineClassRoutePrefixRector::class,
    ]);