feat(langchain): add support for reasoning content with new reasoning providers and integrate ChatDeepSeek model

Change-Id: I60b0bdc5837f88c554957d322273e8dbd63dc677
Signed-off-by: 久氢 <mapenghui.mph@alibaba-inc.com>

Author: 久氢

agentrun/integration/langchain/model_adapter.py

@@ -11,6 +11,16 @@
 )
 from agentrun.integration.utils.adapter import ModelAdapter
 
+# 支持 reasoning_content 的供应商列表
+_REASONING_PROVIDERS = frozenset({
+    "tongyi",
+    "custom",
+    "deepseek",
+    "zhipuai",
+    "moonshot",
+    "minimax",
+})
+
 
 class LangChainModelAdapter(ModelAdapter):
     """LangChain 模型适配器 / LangChain Model Adapter
@@ -23,15 +33,36 @@ def __init__(self):
 
     def wrap_model(self, common_model: Any) -> Any:
         """包装 CommonModel 为 LangChain BaseChatModel / LangChain Model Adapter"""
+        info = common_model.get_model_info()  # 确保模型可用
+        provider = (info.provider or "").lower()
+
+        if provider in _REASONING_PROVIDERS:
+            return self._create_reasoning_model(info)
+        return self._create_openai_model(info)
+
+    def _create_reasoning_model(self, info: Any) -> Any:
+        """创建支持 reasoning_content 的模型（使用 ChatDeepSeek）"""
+        from langchain_deepseek import ChatDeepSeek
+
+        return ChatDeepSeek(
+            model=info.model,
+            api_key=info.api_key,
+            api_base=info.base_url,
+            default_headers=info.headers,
+            stream_usage=True,
+            streaming=True,
+        )
+
+    def _create_openai_model(self, info: Any) -> Any:
+        """创建标准 OpenAI 兼容模型"""
         from langchain_openai import ChatOpenAI
 
-        info = common_model.get_model_info()  # 确保模型可用
         return ChatOpenAI(
             name=info.model,
             api_key=info.api_key,
             model=info.model,
             base_url=info.base_url,
             default_headers=info.headers,
             stream_usage=True,
-            streaming=True,  # 启用流式输出以支持 token by token
+            streaming=True,
         )

pyproject.toml

@@ -38,6 +38,7 @@ server = [
 langchain = [
     "langchain>=1.0.0; python_version >= '3.10'",
     "langchain-openai>=1.0.0; python_version >= '3.10'",
+    "langchain-deepseek>=1.0.1; python_version >= '3.10'",
 ]
 
 google-adk = [