The /bargein API called in livekit/agents/inference/interruption.py, how I should handle it for self-hosted livekit and my own voice ai agent?

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

async def _connect_ws(self) -> aiohttp.ClientWebSocketResponse: """Connect to the LiveKit Adaptive Interruption WebSocket.""" settings = InterruptionWSSessionCreateSettings( sample_rate=self._opts.sample_rate, num_channels=1, threshold=self._opts.threshold, min_frames=self._model._opts.min_frames, encoding="s16le", ) base_url = self._opts.base_url if base_url.startswith(("http://", "https://")): base_url = base_url.replace("http", "ws", 1) headers = { "Authorization": f"Bearer {create_access_token(self._opts.api_key, self._opts.api_secret)}" } try: ws = await asyncio.wait_for( self._session.ws_connect(f"{base_url}/bargein", headers=headers), self._conn_options.timeout, ) except ( aiohttp.ClientConnectorError, asyncio.TimeoutError, aiohttp.ClientResponseError, ) as e: if isinstance(e, aiohttp.ClientResponseError) and e.status == 429: raise APIStatusError( "LiveKit Adaptive Interruption quota exceeded", status_code=e.status, retryable=False, ) from e elif isinstance(e, asyncio.TimeoutError): raise APIConnectionError( "failed to connect to LiveKit Adaptive Interruption: timeout", retryable=False, ) from e raise APIConnectionError("failed to connect to LiveKit Adaptive Interruption") from e try: msg = InterruptionWSSessionCreateMessage( type=InterruptionWSMessageType.SESSION_CREATE, settings=settings, ) await ws.send_str(msg.model_dump_json()) except Exception as e: await ws.close() raise APIConnectionError( "failed to send session.create message to LiveKit Adaptive Interruption" ) from e return ws Above is the code snippet from inerruption.py

Thanks — you provided the

_connect_ws

snippet that opens a WebSocket to

.../bargein

. That helps a lot. A couple quick clarifying questions so I give the most useful guidance: • Is that

base_url

currently pointing at your self‑hosted LiveKit server (e.g.,

http://my-livekit:7880

) or to a LiveKit cloud/adaptive-interruption service URL? • Do you expect

/bargein

to be an HTTP/WebSocket endpoint provided by your deployment, or did you expect it to be hosted as part of LiveKit out of the box? • What exact runtime behavior do you want when barge‑in happens? (Examples: immediately stop TTS and switch to listening; cancel current inference and restart; or queue an interruption and let the agent finish a short clean‑up.) What I can recommend based on your snippet and typical architectures: • If

base_url

is pointing at a third‑party/cloud adaptive interruption service: ◦ Your code is correctly converting

http(s)

→

ws(s)

and attaching an Authorization header. ◦ The next required piece is that the remote

/bargein

WebSocket server must implement the expected session protocol (it should accept your SESSION_CREATE JSON message and then send interruption events). If you use a hosted LiveKit Adaptive Interruption service, point

base_url

to that service and ensure your API key/secret are valid. • If you are self‑hosting LiveKit and expect

/bargein

to exist on your server: ◦ Self‑hosted LiveKit does not automatically provide a

/bargein

adaptive-interruption WebSocket endpoint unless you implement one. Your

_connect_ws

will fail to connect unless you add a WebSocket route that understands the same session messages you send (the

SESSION_CREATE

payload and subsequent protocol). ◦ Two practical options for self‑hosting: ▪︎ Implement your own barge‑in WebSocket service (a small service that runs alongside your agent). It should: 1. Accept the same session create message your client sends. 2. Perform whatever audio-level detection or eventing you need (VAD, DNN-based interruption detector, or incoming user audio events). 3. Send interruption events back over the WS to trigger agent behavior (or call your agent’s control API). 4. Use the same encoding/settings contract (

encoding

,

sample_rate

,

threshold

,

min_frames

) so your client and service agree. ▪︎ Skip the adaptive-interruption WS entirely and use LiveKit agent/session control APIs you already have: • Have your agent listen for control messages (HTTP, WebSocket, or in-room data messages) to perform interruption actions like

session.interrupt()

, cancelling playback, or switching to listening mode. • Implement a simple HTTP endpoint (e.g.,

/bargein

) that, when POSTed, triggers the agent to stop TTS/playback and start capture. Your

_connect_ws

code would be replaced or complemented by code that calls your agent control endpoint instead. If you want a concrete example, tell me which path you prefer and I’ll draft one: • A minimal WebSocket server implementation (Python aiohttp) that speaks the same SESSION_CREATE + interruption messages and responds to client audio events. • An HTTP control endpoint plus a small agent-side handler that cancels playback and triggers listening (with sample async code to call

session.interrupt()

or equivalent in your agent). • Or instructions for pointing your client to a hosted adaptive-interruption service (if you have that URL). Paste the current

base_url

you’re using (obfuscate secrets) and which behavior you want on barge‑in, and I’ll produce the matching code snippet and sequence of steps. , with interactive elements