import asyncio

async def main():
    from claude_agent_sdk import query, ClaudeAgentOptions

    options = ClaudeAgentOptions(model="claude-3-5-sonnet-20241022", system_prompt="You are a helpful assistant.")
    async for msg in query(prompt="Say a short hello.", options=options):
        print(f"Message type: {type(msg)}")
        print(f"Message content: {getattr(msg, 'content', 'No content')}")
        if hasattr(msg, 'total_cost_usd'):
            print(f"Cost: {msg.total_cost_usd}")
            print(f"Usage: {getattr(msg, 'usage', 'No usage')}")
        if hasattr(msg, '__dict__'):
            print(f"Dict keys: {msg.__dict__.keys()}")

if __name__ == "__main__":
    asyncio.run(main())