diff --git a/network-poc/frontend/src/pages/index.astro b/network-poc/frontend/src/pages/index.astro
index 62b40a5..5a77271 100644
--- a/network-poc/frontend/src/pages/index.astro
+++ b/network-poc/frontend/src/pages/index.astro
@@ -163,7 +163,18 @@ OUTPUT FORMAT:
 - List max 3-5 most important findings
 - End with overall assessment: "SHIP IT" or "NEEDS WORK: reason"` },
     };
-    let agents = JSON.parse(localStorage.getItem('kpn-agents') || 'null') || JSON.parse(JSON.stringify(defaultAgents));
+    // Versio: kasvata kun oletuspromptit muuttuvat → localStorage päivittyy automaattisesti
+    const AGENTS_VERSION = 2;
+    let agents;
+    const savedVersion = parseInt(localStorage.getItem('kpn-agents-version') || '0');
+    if (savedVersion < AGENTS_VERSION) {
+        // Uudet oletukset — ylikirjoitetaan vanhat
+        agents = JSON.parse(JSON.stringify(defaultAgents));
+        localStorage.setItem('kpn-agents', JSON.stringify(agents));
+        localStorage.setItem('kpn-agents-version', String(AGENTS_VERSION));
+    } else {
+        agents = JSON.parse(localStorage.getItem('kpn-agents') || 'null') || JSON.parse(JSON.stringify(defaultAgents));
+    }
     function saveAgents() { localStorage.setItem('kpn-agents', JSON.stringify(agents)); }
     function getAgentModel(name) { const a = agents[name]; return a ? a.model : name; }