Update rag_langgraph.py

rag_langgraph.py

@@ -92,7 +92,7 @@ def create_graph(topic, word_count):
         | JsonOutputFunctionsParser()
     )
 
-    research_agent = create_agent(llm, [tavily_tool], system_prompt=f"Based on research papers, write a {word_count}-word article on topic {topic}. Add a references section with research papers.")
+    research_agent = create_agent(llm, [tavily_tool], system_prompt=f"Research content on topic {topic}, prioritizing research papers. Then write a {word_count}-word article on topic {topic}. Add a references section with research papers.")
     research_node = functools.partial(agent_node, agent=research_agent, name="Researcher")
     
     workflow = StateGraph(AgentState)