From 714778bda8430259c92e2a1a659c37a2af010589 Mon Sep 17 00:00:00 2001
From: leekaimao <361204176@qq.com>
Date: Mon, 23 Mar 2026 19:53:31 +0800
Subject: [PATCH] fix: place reminder text after tool_result in message content

The reminder was incorrectly inserted at the beginning of the results
list, which violates Anthropic API's requirement that tool_result must
immediately follow tool_use. Changed insert(0, ...) to append(...) to
place the reminder after all tool_result blocks.

Fixes BadRequestError: tool_use ids were found without tool_result
blocks immediately after.
---
 agents/s03_todo_write.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/agents/s03_todo_write.py b/agents/s03_todo_write.py
index af0109cba..13ecbf7a3 100644
--- a/agents/s03_todo_write.py
+++ b/agents/s03_todo_write.py
@@ -187,7 +187,7 @@ def agent_loop(messages: list):
                     used_todo = True
         rounds_since_todo = 0 if used_todo else rounds_since_todo + 1
         if rounds_since_todo >= 3:
-            results.insert(0, {"type": "text", "text": "<reminder>Update your todos.</reminder>"})
+            results.append({"type": "text", "text": "<reminder>Update your todos.</reminder>"})
         messages.append({"role": "user", "content": results})