From 03514d8b710d94d113b6cbf4e10b5079f3dd4865 Mon Sep 17 00:00:00 2001
From: zhanglongmin <zhanglongmin@huawei.com>
Date: Sat, 26 Jul 2025 10:08:14 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8Dlanggraph=3D=3D0.5.1?=
 =?UTF-8?q?=E7=89=88=E6=9C=AC=E5=BC=95=E7=94=A8langchain-core>=3D0.3.69?=
 =?UTF-8?q?=E7=89=88=E6=9C=AC=E5=AF=BC=E8=87=B4=E7=9A=84=E9=97=AE=E9=A2=98?=
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langchain-core在0.3.69版本修改了Runnable的继承顺序,导致langgraph中的PregelProtocol出现MRO问题，该问题在langgraph==0.5.3版本解决

langchain-core修改：https://github.com/langchain-ai/langchain/pull/31877/commits/ac3ffefa7d67be79e68793a43cdb79257ff7079e#diff-836773d27f8565f4dd45e9d6cf828920f89991a880c098b7511e0d3bb78a8a0d
langgraph修复：https://github.com/langchain-ai/langgraph/pull/5485

#ICLBPB
---
 pyproject.toml | 1 +
 uv.lock        | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/pyproject.toml b/pyproject.toml
index 6f7b1af..cba3ada 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,6 +6,7 @@ readme = "README.md"
 requires-python = ">=3.11"
 dependencies = [
     "aiohttp==3.11.10",
+    "langchain-core==0.3.68",
     "langgraph==0.5.1",
     "mcp==1.7.1",
     "pydantic==2.10.6",
diff --git a/uv.lock b/uv.lock
index 7f6a16f..2fe8fa5 100644
--- a/uv.lock
+++ b/uv.lock
@@ -541,6 +541,7 @@ version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
     { name = "aiohttp" },
+    { name = "langchain-core" },
     { name = "langgraph" },
     { name = "mcp" },
     { name = "pydantic" },
@@ -561,6 +562,7 @@ dev = [
 [package.metadata]
 requires-dist = [
     { name = "aiohttp", specifier = "==3.11.10" },
+    { name = "langchain-core", specifier = "==0.3.68" },
     { name = "langgraph", specifier = "==0.5.1" },
     { name = "mcp", specifier = "==1.7.1" },
     { name = "pydantic", specifier = "==2.10.6" },
-- 
Gitee