Integration with Langfuse?

[gabrielfior]

How can I pass a Langfuse callback handler to CrewAI so that the traces are available on their web UI? Here's what I have so far

from langchain_openai import ChatOpenAI
llm = ChatOpenAI(
            model=self.model,
            api_key=keys.openai_api_key.get_secret_value(),
            temperature=0.0,
            callbacks=[LangfuseCallbackHandler()],
        )
# this produces traces on Langfuse Web UI - similarly, `llm.predict`, `chain.run` also do
llm.invoke("What are some theories about the relationship between unemployment and inflation?" )

# this does not produce traces
predictor = Agent(
            role="Professional Gambler",
            goal="XXX",
            backstory="XXX",
            llm=llm,
        )
     
task_final_decision = Task(
            description=MY_PROMPT,
            agent=predictor,
        )

 crew = Crew(
            agents=[predictor],
            tasks=[task_final_decision],
            verbose=2,
        )

crew.kickoff()

Any guidance around this integration much appreciated.

[cracksauce]

Commenting in support, would be a huge fan of this integration