diff --git a/internal/service/static/main.js b/internal/service/static/main.js
index 7076bee..61a9309 100644
--- a/internal/service/static/main.js
+++ b/internal/service/static/main.js
@@ -674,7 +674,7 @@ class Odidere {
           }
 
           // Collect tool results and render once all have arrived.
-          if (message.role === 'tool' && pendingTools.assistant) {
+          if (message.role === 'tool' && pendingTools && pendingTools.assistant) {
             pendingTools.results.push(message);
             // Add to history (server needs it) but don't render yet.
             this.#appendHistory([message]);