diff --git a/bridge/aria_bridge.py b/bridge/aria_bridge.py
index 95b95de..efd385e 100644
--- a/bridge/aria_bridge.py
+++ b/bridge/aria_bridge.py
@@ -2806,8 +2806,18 @@ class ARIABridge:
                     "message": payload.get("message", ""),
                     "stack": payload.get("stack", ""),
                 }
-                with (log_dir / "app.log").open("a", encoding="utf-8") as f:
+                log_path = log_dir / "app.log"
+                with log_path.open("a", encoding="utf-8") as f:
                     f.write(json.dumps(line, ensure_ascii=False) + "\n")
+                # Rotation: app.log waechst sonst unbegrenzt (jede App-Log-Zeile
+                # haengt an). Bei >5 MB die letzten 2000 Zeilen behalten.
+                try:
+                    if log_path.stat().st_size > 5 * 1024 * 1024:
+                        tail = log_path.read_text(encoding="utf-8",
+                                                  errors="ignore").splitlines()[-2000:]
+                        log_path.write_text("\n".join(tail) + "\n", encoding="utf-8")
+                except Exception:
+                    pass
                 logger.info("[app-log] %s %s: %s",
                             line["level"], line["scope"], line["message"][:120])
             except Exception as exc:
diff --git a/diagnostic/server.js b/diagnostic/server.js
index 34968a6..788c3d5 100644
--- a/diagnostic/server.js
+++ b/diagnostic/server.js
@@ -1018,12 +1018,6 @@ 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)
@@ -1080,7 +1074,6 @@ function connectRVS(forcePlain) {
       } else if (msg.type === "worker_hello") {
         // Ein Compute-Worker (GPU-Dienst) meldet sich mit seiner Identitaet.
         const p = msg.payload || {};
-        log("info", "rvs", `worker_hello empfangen: ${p.instanceId || "?"} (service=${p.service || "?"}, models=${JSON.stringify(p.models || [])})`);
         if (p.instanceId) {
           const prev = workers.get(p.instanceId) || {};
           // War die Box vor diesem hello schon frisch gesehen? worker_hello wird