diff --git a/lib/agent-runtime.js b/lib/agent-runtime.js
index ef2f1db..fc8c6ad 100644
--- a/lib/agent-runtime.js
+++ b/lib/agent-runtime.js
@@ -30,6 +30,7 @@ function createAgentRuntime(deps) {
         args.push('--permission-mode', 'plan');
         break;
       case 'default':
+        args.push('--permission-mode', 'default');
         break;
     }
     if (session.claudeSessionId) {