How do let a python agent to send message in the chat ?

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

And how do i make the agent read and the incoming messages ?

You're asking how to make a Python agent read and process incoming chat messages. By default the agent already listens on the lk.chat topic and will receive and respond to messages automatically. If you want custom behavior, you can register a text-input callback to inspect, filter, or handle messages before replying. What you can do (two options) • Default automatic handling ◦ Send messages from clients to topic

lk.chat

. The agent will receive them, interrupt if needed, and generate replies automatically. • Custom handling with a text input callback ◦ Provide

TextInputOptions.text_input_cb

when starting the session to run your own handler. In the handler you can: ▪︎ Read

event.text

▪︎ Apply filters or command handling ▪︎ Call

session.say(...)

to speak + add to chat, or

session.generate_reply(user_input=...)

/

session.interrupt()

to trigger the agent reply ▪︎ Or use

session.interrupt()

then

session.generate_reply(user_input=message)

for default-style responses Example callback (conceptual):

def custom_text_input_handler(session: AgentSession, event: room_io.TextInputEvent):
    msg = event.text
    if msg.startswith("/help"):
        await session.say("Available commands: /help, /status")
        return
    # filter example
    if "spam" in msg.lower():
        await session.say("I can't respond to that.")
        return
    # default behavior: interrupt and generate reply
    session.interrupt()
    await session.generate_reply(user_input=msg)

How to set it when starting the session:

await session.start(
    agent=Agent(instructions="You are a helpful assistant."),
    room=ctx.room,
    room_options=room_io.RoomOptions(
        text_input=room_io.TextInputOptions(text_input_cb=custom_text_input_handler)
    )
)

If you'd like, I can: • Provide a complete runnable Python example that includes

AgentSession

setup, the callback, and sending a test message. • Or show how to send messages from a client so the agent receives them. Which would help more? Sources: Text and transcriptions | LiveKit docs

Is there a way to hide the chat from the videoconference component

You can hide the chat by removing or not rendering the chat UI on the client—how you do that depends on which frontend/sdk you’re using. • If you use LiveKit’s React components (e.g., @livekit/components-react), omit the chat component from your layout or use the smaller building blocks (

useTracks

,

VideoRenderer

, etc.) and don't include any chat/text components. The agent-starter templates expose a

supportsChatInput

flag you can disable. • If you have a custom frontend, simply don't render any UI that shows or sends messages to the

lk.chat

topic. • If you want to disable chat entirely (not just hide it), stop calling

sendText()

from participants and don’t register text handlers on the client. Which UI framework or component are you using (React, Flutter, plain JS, mobile)? I’ll give a short code example for that environment. Sources: Text and transcriptions | LiveKit docs | Sending text | LiveKit docs | Examples | livekit/livekit_composite | DeepWiki