diff --git a/diagnostic/server.js b/diagnostic/server.js
index 51f6869..71a6898 100644
--- a/diagnostic/server.js
+++ b/diagnostic/server.js
@@ -1018,6 +1018,12 @@ function connectRVS(forcePlain) {
   ws.on("message", (raw) => {
     try {
       const msg = JSON.parse(raw.toString());
+      // DEFINITIVE Roh-Diagnose: jede worker_*/sat_hello-Nachricht loggen, BEVOR
+      // irgendein Handler greift — zeigt eindeutig, ob sie ueberhaupt ankommt.
+      if (msg.type && (msg.type.indexOf("worker") === 0 || msg.type === "sat_hello")) {
+        const p = msg.payload || {};
+        log("info", "rvs", `RX ${msg.type} <- ${p.instanceId || p.id || "?"} (svc=${p.service || "-"})`);
+      }
       if (msg.type === "chat" && msg.payload) {
         const sender = msg.payload.sender || "?";
         // Eigene Nachrichten ignorieren (Echo)