ChatKit

agent-framework-chatkit convierte los elementos del hilo de ChatKit de OpenAI en mensajes de Agent Framework y convierte las actualizaciones del agente transmitidas en streaming de nuevo en eventos de ChatKit. Úselo cuando desee una interfaz de ChatKit con un backend en Python de Agent Framework.

La integración proporciona:

• ThreadItemConverter para convertir elementos de hilo y archivos adjuntos de ChatKit.
• stream_agent_response() para convertir las actualizaciones transmitidas del agente en eventos de ChatKit.
• simple_to_agent_input() para la ruta de conversión de mensajes predeterminada.

Prerequisites

• Python 3.10 o posterior.
• Un marco web back-end, como FastAPI.
• Node.js para el front-end de ChatKit.
• Una clave de dominio de ChatKit para un dominio de front-end de producción.

Instalar el paquete

pip install agent-framework-chatkit --pre

Creación de un servidor de ChatKit

Cree una subclase de ChatKitServer, cree un agente de Agent Framework y configure un convertidor para los elementos del hilo y los archivos adjuntos.

class WeatherChatKitServer(ChatKitServer[dict[str, Any]]):
    """ChatKit server implementation using Agent Framework.

    This server integrates Agent Framework agents with ChatKit's server protocol,
    providing weather information with interactive widgets and time queries through Azure OpenAI.
    """

    def __init__(self, data_store: SQLiteStore, attachment_store: FileBasedAttachmentStore):
        super().__init__(data_store, attachment_store)

        logger.info("Initializing WeatherChatKitServer")

        # Create Agent Framework agent with Azure OpenAI
        # For authentication, run `az login` command in terminal
        try:
            self.weather_agent = Agent(
                client=FoundryChatClient(credential=AzureCliCredential()),
                instructions=(
                    "You are a helpful weather assistant with image analysis capabilities. "
                    "You can provide weather information for any location, tell the current time, "
                    "and analyze images that users upload. Be friendly and informative in your responses.\n\n"
                    "If a user asks to see a list of cities or wants to choose from available cities, "
                    "use the show_city_selector tool to display an interactive city selector.\n\n"
                    "When users upload images, you will automatically receive them and can analyze their content. "
                    "Describe what you see in detail and be helpful in answering questions about the images."
                ),
                tools=[get_weather, get_time, show_city_selector],
            )
            logger.info("Weather agent initialized successfully with Azure OpenAI")
        except Exception as e:
            logger.error(f"Failed to initialize weather agent: {e}")
            raise

        # Create ThreadItemConverter with attachment data fetcher
        self.converter = ThreadItemConverter(
            attachment_data_fetcher=self._fetch_attachment_data,
        )

Conversión y transmisión de respuestas

Cargue el historial de subprocesos, conviértelo en mensajes de Agent Framework, ejecute el agente en modo de streaming y produzca eventos de ChatKit.

async def respond(
    self,
    thread: ThreadMetadata,
    input_user_message: UserMessageItem | None,
    context: dict[str, Any],
) -> AsyncIterator[ThreadStreamEvent]:
    """Handle incoming user messages and generate responses.

    This method converts ChatKit messages to Agent Framework format using ThreadItemConverter,
    runs the agent, converts the response back to ChatKit events using stream_agent_response,
    and creates interactive weather widgets when weather data is queried.
    """
    from agent_framework import FunctionResultContent

    if input_user_message is None:
        logger.debug("Received None user message, skipping")
        return

    logger.info(f"Processing message for thread: {thread.id}")

    try:
        # Track weather data and city selector flag for this request
        weather_data: WeatherData | None = None
        show_city_selector = False

        # Load full thread history from the store
        thread_items_page = await self.store.load_thread_items(
            thread_id=thread.id,
            after=None,
            limit=1000,
            order="asc",
            context=context,
        )
        thread_items = thread_items_page.data

        # Convert ALL thread items to Agent Framework ChatMessages using ThreadItemConverter
        # This ensures the agent has the full conversation context
        agent_messages = await self.converter.to_agent_input(thread_items)

        if not agent_messages:
            logger.warning("No messages after conversion")
            return

        logger.info(f"Running agent with {len(agent_messages)} message(s)")

        # Run the Agent Framework agent with streaming
        agent_stream = self.weather_agent.run(agent_messages, stream=True)

        # Create an intercepting stream that extracts function results while passing through updates
        async def intercept_stream() -> AsyncIterator[AgentResponseUpdate]:
            nonlocal weather_data, show_city_selector
            async for update in agent_stream:
                # Check for function results in the update
                if update.contents:
                    for content in update.contents:
                        if isinstance(content, FunctionResultContent):
                            result = content.result

                            # Check if it's a WeatherResponse (string subclass with weather_data attribute)
                            if isinstance(result, str) and hasattr(result, "weather_data"):
                                extracted_data = getattr(result, "weather_data", None)
                                if isinstance(extracted_data, WeatherData):
                                    weather_data = extracted_data
                                    logger.info(f"Weather data extracted: {weather_data.location}")
                            # Check if it's the city selector marker
                            elif isinstance(result, str) and result == "__SHOW_CITY_SELECTOR__":
                                show_city_selector = True
                                logger.info("City selector flag detected")
                yield update

        # Stream updates as ChatKit events with interception
        async for event in stream_agent_response(
            intercept_stream(),
            thread_id=thread.id,
        ):
            yield event

En el ejemplo completo también se muestran subprocesos respaldados por SQLite, cargas de archivos, almacenamiento de datos adjuntos, acciones y widgets interactivos.

Pasos siguientes