From 8a1afdfc75d0186b4f80da07ee802c56ee101774 Mon Sep 17 00:00:00 2001
From: hefeng6500 <2443992009@qq.com>
Date: Mon, 3 Nov 2025 11:38:59 +0800
Subject: [PATCH] fix(docs): add checkpointer=InMemorySaver() to trim_messages
 example for persistent memory

---
 src/oss/langchain/short-term-memory.mdx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/oss/langchain/short-term-memory.mdx b/src/oss/langchain/short-term-memory.mdx
index 80c990e754..e3694cf725 100644
--- a/src/oss/langchain/short-term-memory.mdx
+++ b/src/oss/langchain/short-term-memory.mdx
@@ -981,8 +981,9 @@ def trim_messages(state: AgentState, runtime: Runtime) -> dict[str, Any] | None:
 
 agent = create_agent(
     model,
-    tools=tools,
+    tools=[],
     middleware=[trim_messages]
+    checkpoint=InMemorySaver()
 )
 
 config: RunnableConfig = {"configurable": {"thread_id": "1"}}