diff --git a/buffet/notification/notification_delegate.h b/buffet/notification/notification_delegate.h
index 06b30d4..b2d7184 100644
--- a/buffet/notification/notification_delegate.h
+++ b/buffet/notification/notification_delegate.h
@@ -5,8 +5,11 @@
 #ifndef BUFFET_NOTIFICATION_NOTIFICATION_DELEGATE_H_
 #define BUFFET_NOTIFICATION_NOTIFICATION_DELEGATE_H_
 
+#include <memory>
 #include <string>
 
+#include <base/values.h>
+
 namespace buffet {
 
 class NotificationDelegate {
@@ -14,6 +17,8 @@
   virtual void OnConnected(const std::string& channel_name) = 0;
   virtual void OnDisconnected() = 0;
   virtual void OnPermanentFailure() = 0;
+  // Called when a new command is sent via the notification channel.
+  virtual void OnCommandCreated(const base::DictionaryValue& command) = 0;
 
  protected:
   virtual ~NotificationDelegate() = default;