Update app_langgraph.py

app_langgraph.py

@@ -15,7 +15,8 @@ from math_tools import multiply, add, subtract, divide
 # from langchain_community.vectorstores import SupabaseVectorStore
 import json
 from langchain_google_genai import ChatGoogleGenerativeAI
-from langchain_alibaba.chat_models import ChatDashScope
+from langchain_openai import ChatOpenAI
+from langchain_core.messages import HumanMessage
 
 # set_debug(True)
 load_dotenv()
@@ -33,11 +34,12 @@ tools = [
 def build_graph():
     dashscope_key = os.getenv("CODING_PLAN_API_KEY")  # 从 Coding Plan 页面获取
     
-    llm = ChatDashScope(
-        model="qwen3.5-plus",  # Coding Plan 支持的模型 [[6]]
-        dashscope_api_key=dashscope_key,
-        base_url="https://coding.dashscope.aliyuncs.com/v1",  # ⚠️ 关键：Coding Plan 专属 Base URL
+    llm = ChatOpenAI(
+        api_key=os.getenv("DASHSCOPE_API_KEY"),
+        base_url="https://dashscope.aliyuncs.com/compatible-mode/v1",  # ⚠️ 关键：DashScope 兼容地址
+        model="qwen-plus",  # 支持 qwen-plus, qwen-max, qwen-turbo 等
         temperature=0.1,
+        verbose=True
     )
     
     chat_with_tools = llm.bind_tools(tools)