diff --git a/system/Router/RouteCollectionInterface.php b/system/Router/RouteCollectionInterface.php
index 10587d81ee4c..4fc5158611c4 100644
--- a/system/Router/RouteCollectionInterface.php
+++ b/system/Router/RouteCollectionInterface.php
@@ -264,4 +264,16 @@ public function isFiltered(string $search, ?string $verb = null): bool;
      * @return list<string> filter_name or filter_name:arguments like 'role:admin,manager'
      */
     public function getFiltersForRoute(string $search, ?string $verb = null): array;
+
+    /**
+     * Get all controllers in Route Handlers
+     *
+     * @param string|null $verb HTTP verb like `GET`,`POST` or `*` or `CLI`.
+     *                          `'*'` returns all controllers in any verb.
+     *
+     * @return list<string> controller name list
+     *
+     * @internal
+     */
+    public function getRegisteredControllers(?string $verb = '*'): array;
 }
diff --git a/system/View/RendererInterface.php b/system/View/RendererInterface.php
index d42dcee88442..6116345fe2b4 100644
--- a/system/View/RendererInterface.php
+++ b/system/View/RendererInterface.php
@@ -71,4 +71,19 @@ public function setVar(string $name, $value = null, ?string $context = null);
      * @return RendererInterface
      */
     public function resetData();
+
+    /**
+     * Returns the rendered data from all views, organized by view name.
+     *
+     * @return array<string, array>
+     */
+    public function getData(): array;
+
+    /**
+     * Returns the performance data that might have been collected
+     * during the execution. Used by the Debug Toolbar.
+     *
+     * @return array<int, array>
+     */
+    public function getPerformanceData(): array;
 }