Internal resources (#295)

* add note about internal

Author: pwright

input/troubleshooting/index.md

@@ -205,7 +205,10 @@ This procedure applies to both Kubernetes and local system sites.
    - `/site-namespace/resources/Listener-<name>.yaml` - Listener configuration and status
 
 
+You may notice resources that contain labels prefixed with `internal.skupper.io/`.
 
+**📌 NOTE**
+Labels prefixed with `internal.skupper.io/` are **internal-only**. They are subject to change without notice in future versions of Skupper. Do not modify, delete, or build automation that depends on the state or existence of these labels. 
 
 
 <a id="resolving-common-problems"></a>