diff --git a/frontend/src/components/simulator/SerialMonitor.tsx b/frontend/src/components/simulator/SerialMonitor.tsx
index f18ced5c..07ea11ef 100644
--- a/frontend/src/components/simulator/SerialMonitor.tsx
+++ b/frontend/src/components/simulator/SerialMonitor.tsx
@@ -250,6 +250,8 @@ export const SerialMonitor: React.FC = () => {
           >
             {t('editor.serial.clear')}
           </button>
+          {/* Overlay slot for per-board terminal actions (empty in OSS). */}
+          <span data-velxio-slot="serial-actions" />
         </div>
       </div>