This simple PR allows someone to specify run_context data via a function that gets invoked every time, rather than simple static data. This is super useful for your agent to, for example, have access to data you want to load from a database each time:

        def get_current_trips():
            current_trips = session.query(Trip).all()
            trip_list = "\n".join([f"{t.id}: {t.title} ({t.start_date} - {t.end_date})" for t in current_trips])
            return trip_list

        runner = AgentRunner(new_agent)
        runner.repl_loop({"trip_id": trip.id, "current_trips": get_current_trips})

So supplying current_trips as a function means that the function gets invoked every time before the next turn.