--- /dev/null
+<?php
+
+namespace Drupal\{{ machine_name }}\PageCache;
+
+use Drupal\Core\PageCache\ResponsePolicyInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+/**
+ * A policy disallowing caching requests with certain cookies.
+ */
+class {{ class }} implements ResponsePolicyInterface {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function check(Response $response, Request $request) {
+ if ($request->cookies->get('foo')) {
+ return self::DENY;
+ }
+ }
+
+}