diff --git a/controller.ts b/controller.ts
index 49e139f..73db02f 100644
--- a/controller.ts
+++ b/controller.ts
@@ -258,6 +258,7 @@ export class FanoutController {
     if (event.type === "message_end" && event.message) {
       const msg = event.message as Message;
       if (msg.role === "assistant") {
+        // Cache latest assistant text for live preview
         job.usage.turns++;
         const usage = msg.usage;
         if (usage) {