introduce thinking mode and reduce recursion limit

app.py

@@ -64,7 +64,7 @@ def ask_wiki(query: str) -> str:
     if not query.strip():
         return "Please provide a valid query."
     try:
-        wiki_toolapi_wrapper = WikipediaAPIWrapper(top_k_results=1, doc_content_chars_max=1000)
+        wiki_toolapi_wrapper = WikipediaAPIWrapper(top_k_results=1, doc_content_chars_max=8000)
         wiki_tool = WikipediaQueryRun(api_wrapper=wiki_toolapi_wrapper)
         result = wiki_tool.run(query)
         return result
@@ -177,10 +177,10 @@ class BasicAgent:
             HumanMessage(
                 # content="Who is Barack Obama?"
                 # content="Divide 6790 by 5"
-                content=question + ' /nothink'
+                content=question # + '/nothink'
             )
         ]
-        response = await agent_graph.ainvoke({"messages": messages}, config={"recursion_limit": 10})
+        response = await agent_graph.ainvoke({"messages": messages}, config={"recursion_limit": 5})
         response_text = response['messages'][-1].content
         return response_text.split('</think>')[-1]