In the manual VAD, and push to talk as suggested here https://github.com/livekit/agents/blob/main/examples/voice_agents/push_to_talk.py Is there a way for agent worker to trigger the start_turn based on when the agent has stopped speaking?

Thanks for reaching out, Tushar. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.

Okay, but how do I inform to the client side that it's his turn to speak!

Hey there! To let the client know it’s their turn to speak, you can use agent-to-client notifications. Here’s a simple way to do it: 1. Set up an RPC method on the client side: The client can register an RPC method that listens for notifications from the agent. For example:

// Client-side JavaScript example
room.localParticipant.registerRpcMethod("your_turn_to_speak", async (data) => {
    // Enable microphone button or show "Your turn to speak" UI
    enableMicrophoneButton();
    showTurnIndicator("Your turn to speak!");
});

1. Notify the client from the agent: Once the agent finishes speaking, you can call the client’s RPC method like this:

async def notify_client_turn():
    for participant in ctx.room.remote_participants.values():
        try:
            await participant.perform_rpc(
                method="your_turn_to_speak",
                payload="",
                response_timeout=5.0
            )
        except Exception as e:
            logger.warning(f"Failed to notify participant {participant.identity}: {e}")

1. Trigger the notification: Use the agent’s state changes to know when they’ve finished speaking, then notify the client:

@session.on("agent_state_changed")
def on_agent_state_changed(event: AgentStateChangedEvent):
    if event.state == "listening":  # Agent finished speaking
        asyncio.create_task(notify_client_turn())

This way, the client will get a friendly nudge when it’s their turn to jump in. If you want me to walk you through any part of this or have questions, just let me know—I’m here to help! Sources: Turn detection and interruptions | LiveKit Docs | livekit-agents/livekit/agents/voice/audio_recognition.py

alright, Is it possible to test this full thing if i am using agents_playground on client side? Basically, is there a feature to register rpc methods on agents_playground isde?

Absolutely, you can register RPC methods on the client side when using agents_playground. Think of agents_playground as just another participant in the room, so you can set up RPC methods just like you would in any other agent app. Here’s a quick example:

ctx.room.local_participant.register_rpc_method(
    "method_name",
    handler_function
)

These methods let you handle requests from the agent and send back responses. It’s a great way to test everything, like letting the client know when it’s their turn to speak. If you want, I’m here to help you get this all set up! Sources: rpc/rpc_agent.py | RPC | LiveKit Docs | livekit-rtc/livekit/rtc/participant.py

How exactly do i do this? Do I have to add this method somewhere in agent_playground's code?

Hey there! To add and register RPC methods in agents_playground, you’ll want to tweak the part of your code where the agent connects to the room. Here’s a friendly step-by-step to guide you through it: 1. Define the RPC handler function: This function is where you’ll handle the RPC requests. For example:

async def handle_my_method(data: RpcInvocationData) -> str:
    try:
        # Process the request
        payload = json.loads(data.payload)
        # Your logic here
        return json.dumps({"success": True, "result": "some_data"})
    except Exception as e:
        return json.dumps({"success": False, "error": str(e)})

1. Register the RPC method: After connecting to the room, use the

register_rpc_method

function like this:

ctx.room.local_participant.register_rpc_method(
    "agent.myMethod",
    handle_my_method
)

1. Organize your code: To keep things nice and tidy, you can create separate functions to register multiple RPC methods:

def register_rpc_handlers(room):
    room.local_participant.register_rpc_method(
        "get_order_state", 
        handle_get_order_state
    )

Just remember to register your methods after you’ve connected to the room but before kicking off the agent session. If you get stuck or want to chat about any part of this, I’m here to help! Sources: Remote method calls (RPC) | LiveKit Docs | complex-agents/teleprompter/cartesia-ink.py | livekit-rtc/livekit/rtc/participant.py