To handle reconnecting a user to the same session with the same identity and resolve the error

ignoring byte stream with topic 'lk.agent.pre-connect-audio-buffer', no callback attached

, follow these steps: 1. Ensure Proper Pre-Connect Buffer Setup: During the initial connection, register the appropriate byte stream handler for the topic

lk.agent.pre-connect-audio-buffer

. 2. Re-register Handlers on Reconnect: When reconnecting, re-register the byte stream handler for the topic. Connection state changes can clear handlers, so this step is crucial. 3. Implement Reconnect Handling: ◦ Re-register byte stream handlers after reconnection. ◦ Re-publish local tracks to maintain the session. 1. Verify Agent Side Configuration: Ensure agents are configured to handle pre-connect audio buffers by registering the appropriate handler during initialization. 2. Error Handling: The error indicates a missing handler. Double-check that the handler is registered before sending data and remains registered through connection state changes. Here’s an example of registering the handler:

// Register the byte stream handler during initialization
room.registerByteStreamHandler('lk.agent.pre-connect-audio-buffer', async (reader, participantId) => {
    try {
        const data = await reader.readAll();
        console.log('Received pre-connect audio buffer from participant:', participantId);
    } catch (error) {
        console.error('Error handling pre-connect audio buffer:', error);
    }
});

And for reconnection:

// During reconnection, re-register the handler
room.on("reconnected", () => {
    room.registerByteStreamHandler('lk.agent.pre-connect-audio-buffer', async (reader, participantId) => {
        try {
            const data = await reader.readAll();
            console.log('Reconnected: Received pre-connect audio buffer from participant:', participantId);
        } catch (error) {
            console.error('Reconnected: Error handling pre-connect audio buffer:', error);
        }
    });
});

By ensuring proper handler registration and re-registration during reconnection, you should be able to resolve the error and maintain functionality. Sources: livekit-agents/livekit/agents/voice/avatar/_datastream_io.py | lib/src/core/engine.dart | livekit/src/rtc_engine/mod.rs | livekit-rtc/livekit/rtc/room.py