feat: Enhance LangGraphAgentAdapter to support optional agent configuration

- Updated LangGraphAgentAdapter to conditionally apply agent configuration when creating the agent graph, allowing for more flexible initialization.
- Modified LangGraphToolAdapter to ensure only instances of BaseTool are converted, improving tool compatibility and handling.

src/crewai/agents/agent_adapters/langgraph/langgraph_adapter.py

@@ -84,13 +84,21 @@ class LangGraphAgentAdapter(BaseAgentAdapter):
             self._memory = MemorySaver()
 
             converted_tools: List[Any] = self._tool_adapter.tools()
-
-            self._graph = create_react_agent(
-                model=self.llm,
-                tools=converted_tools or [],
-                checkpointer=self._memory,
-                debug=self.verbose,
-            )
+            if self._agent_config:
+                self._graph = create_react_agent(
+                    model=self.llm,
+                    tools=converted_tools or [],
+                    checkpointer=self._memory,
+                    debug=self.verbose,
+                    **self._agent_config,
+                )
+            else:
+                self._graph = create_react_agent(
+                    model=self.llm,
+                    tools=converted_tools or [],
+                    checkpointer=self._memory,
+                    debug=self.verbose,
+                )
 
         except ImportError as e:
             self._logger.log(

src/crewai/agents/agent_adapters/langgraph/langgraph_tool_adapter.py

@@ -16,7 +16,7 @@ class LangGraphToolAdapter(BaseToolAdapter):
         Configure and convert CrewAI tools to LangGraph-compatible format.
         LangGraph expects tools in langchain_core.tools format.
         """
-        from langchain_core.tools import StructuredTool
+        from langchain_core.tools import BaseTool, StructuredTool
 
         converted_tools = []
         if self.original_tools:
@@ -24,6 +24,9 @@ class LangGraphToolAdapter(BaseToolAdapter):
         else:
             all_tools = tools
         for tool in all_tools:
+            if isinstance(tool, BaseTool):
+                converted_tools.append(tool)
+                continue
 
             def tool_wrapper(*args, tool=tool, **kwargs):
                 if len(args) > 0 and isinstance(args[0], str):