diff --git a/diagnostic/index.html b/diagnostic/index.html
index fc773a5..903f7e0 100644
--- a/diagnostic/index.html
+++ b/diagnostic/index.html
@@ -1467,6 +1467,22 @@
         <div id="sat-list" style="font-size:12px;color:#8888AA;">(Lade...)</div>
       </div>
 
+      <div style="display:flex;justify-content:space-between;align-items:center;margin:16px 0 8px;">
+        <h2 style="margin:0;">Host-Agenten 💻</h2>
+        <button class="btn secondary" onclick="requestHosts()" style="padding:4px 10px;font-size:11px;">Aktualisieren</button>
+      </div>
+      <div class="card" style="margin-bottom:8px;">
+        <p style="color:#8888AA;font-size:12px;margin:0;">
+          Agenten, die DIREKT auf einem Rechner laufen (Binary + <code>.env</code>) und
+          sich ausgehend mit RVS verbinden — ARIA steuert den Rechner damit auch
+          hinter NAT/Firewall. ARIA nutzt sie ueber <code>host_exec</code> &amp; Co.;
+          Setup siehe <code>host-agent/README</code>.
+        </p>
+      </div>
+      <div class="card">
+        <div id="host-list" style="font-size:12px;color:#8888AA;">(Lade...)</div>
+      </div>
+
       <div id="compute-fleet" style="display:flex;justify-content:space-between;align-items:center;margin:16px 0 8px;scroll-margin-top:70px;">
         <h2 style="margin:0;">Compute-Flotte 🖥️</h2>
         <button class="btn secondary" onclick="requestWorkers()" style="padding:4px 10px;font-size:11px;">Aktualisieren</button>
@@ -2138,6 +2154,7 @@
           satellites.forEach(s => { if (s.online !== false) requestSatCreds(s.id); });
           return;
         }
+        if (msg.type === 'host_update') { hosts = msg.hosts || []; renderHosts(); return; }
         if (msg.type === 'sat_creds_list_result') {
           const p = msg.payload || msg;
           const sat = p.satellite || '';
@@ -4426,6 +4443,7 @@
         loadTriggers();
       } else if (tab === 'satellites') {
         requestSatellites();
+        requestHosts();
         requestWorkers();
       }
     }
@@ -4557,6 +4575,29 @@
     function requestSatCreds(id) {
       send({ action: 'sat_creds_list', satellite: id });
     }
+    let hosts = [];  // [{hostId, name, os, caps, control, online}]
+    function requestHosts() { send({ action: 'host_list' }); }
+    function renderHosts() {
+      const box = document.getElementById('host-list');
+      if (!box) return;
+      if (!hosts.length) {
+        box.innerHTML = '<span style="color:#8888AA;">Kein Host-Agent verbunden. ' +
+          'Baue die Binary (<code>host-agent/build.sh</code>), leg eine <code>.env</code> ' +
+          'daneben und starte sie auf dem Ziel-Rechner.</span>';
+        return;
+      }
+      box.innerHTML = hosts.map(h => {
+        const dot = h.online ? '#34C759' : '#FF3B30';
+        const caps = (h.caps || []).join(', ') || '—';
+        const ctrl = h.control ? '<span style="color:#0096FF;">steuerbar</span>' : '<span style="color:#FF6E6E;">CONTROL_ENABLED=false</span>';
+        return '<div style="border:1px solid #1E1E2E;border-radius:8px;padding:10px;margin-bottom:8px;">' +
+          '<div><span style="display:inline-block;width:8px;height:8px;border-radius:50%;background:' + dot + ';margin-right:6px;"></span>' +
+          '<strong style="color:#E0E0F0;">💻 ' + escapeHtml(h.name || h.hostId) + '</strong> ' +
+          '<span style="color:#666;font-size:11px;">id=' + escapeHtml(h.hostId) + '</span></div>' +
+          '<div style="color:#8888AA;font-size:11px;margin-top:4px;">' + escapeHtml(h.os || '') + ' · kann: ' + escapeHtml(caps) + ' · ' + ctrl + '</div>' +
+          '</div>';
+      }).join('');
+    }
     function scanSatellite(id) {
       satScanning = id;
       renderSatellites();
diff --git a/diagnostic/server.js b/diagnostic/server.js
index 69fb485..e353878 100644
--- a/diagnostic/server.js
+++ b/diagnostic/server.js
@@ -550,6 +550,21 @@ function broadcastSatellites() {
   broadcast({ type: "sat_update", satellites: satelliteList() });
 }
 
+// ── Host-Agenten: Direktzugriff auf einen Rechner ────────────────
+const hosts = new Map(); // hostId → {hostId, name, os, caps, control, last_seen}
+
+function hostList() {
+  const now = Date.now();
+  return Array.from(hosts.values()).map(h => ({
+    hostId: h.hostId, name: h.name, os: h.os, caps: h.caps, control: h.control,
+    online: (now - (h.last_seen || 0)) < 300000,
+  }));
+}
+
+function broadcastHosts() {
+  broadcast({ type: "host_update", hosts: hostList() });
+}
+
 // ── Compute-Fleet: GPU-Worker (voxtral/whisper/f5tts/llm) ──────────
 // Worker melden sich per worker_hello + halten sich per worker_ping (busy) frisch.
 const workers = new Map(); // instanceId → {instanceId, service, node, gpus, model, busy, last_seen}
@@ -1065,6 +1080,21 @@ function connectRVS(forcePlain) {
           });
           broadcastSatellites();
         }
+      } else if (msg.type === "host_hello") {
+        // Ein Host-Agent (Direktzugriff auf einen Rechner) meldet sich.
+        const p = msg.payload || {};
+        if (p.hostId) {
+          const wasKnown = hosts.has(p.hostId);
+          hosts.set(p.hostId, {
+            hostId: p.hostId, name: p.name || p.hostId, os: p.os || "",
+            caps: p.caps || [], control: !!p.control, last_seen: Date.now(),
+          });
+          if (!wasKnown) broadcastHosts();
+          else hosts.get(p.hostId).last_seen = Date.now();
+        }
+      } else if (msg.type === "host_ping") {
+        const p = msg.payload || {};
+        if (p.hostId && hosts.has(p.hostId)) hosts.get(p.hostId).last_seen = Date.now();
       } else if (msg.type === "sat_devices") {
         // Antwort eines Satelliten auf sat_discover → Geraeteliste an Browser.
         const p = msg.payload || {};
@@ -2721,6 +2751,8 @@ wss.on("connection", (ws) => {
   if (currentDiskStatus) ws.send(JSON.stringify(currentDiskStatus));
   // Aktuell bekannte Satelliten mitgeben (RVS replayt sat_hello nicht).
   ws.send(JSON.stringify({ type: "sat_update", satellites: satelliteList() }));
+  // Aktuell bekannte Host-Agenten mitgeben.
+  ws.send(JSON.stringify({ type: "host_update", hosts: hostList() }));
   // Aktuell bekannte Compute-Worker mitgeben (RVS replayt worker_hello nicht).
   ws.send(JSON.stringify({ type: "worker_update", workers: workerList() }));
 
@@ -2754,6 +2786,9 @@ wss.on("connection", (ws) => {
       } else if (msg.action === "sat_list") {
         // Browser will die aktuelle Satelliten-Liste.
         ws.send(JSON.stringify({ type: "sat_update", satellites: satelliteList() }));
+      } else if (msg.action === "host_list") {
+        // Browser will die aktuelle Host-Agenten-Liste.
+        ws.send(JSON.stringify({ type: "host_update", hosts: hostList() }));
       } else if (msg.action === "worker_list") {
         // Browser will die aktuelle Compute-Flotte.
         ws.send(JSON.stringify({ type: "worker_update", workers: workerList() }));