how to remove get agent identity and remove it from the room in python

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

I don't want to remove all participants from room. I want to reomve the agent when new particpnat joined. without closing the room

Thanks — I understand you want the agent removed automatically when a new participant joins, without closing the room. I’ll show a clear Python approach and ask one quick question so I give the right sample for your setup. Quick question • Is your system able to receive LiveKit webhooks (recommended), or do you prefer polling the room state from a server process? (Choose one: webhook or polling.) If you can use webhooks (recommended) 1. Configure LiveKit to send

participant_joined

webhooks to your server. 2. When you receive a

participant_joined

event, call the Server SDK method to remove only the agent participant from that room. Example flow (webhook + Python) 1. Webhook receives event -> extract

room

and

new participant identity

. 2. Identify the agent participant (by fixed identity, prefix, or metadata). 3. Call

remove_participant

for that agent identity. Pseudo-Python outline

# 1. Webhook handler receives participant_joined event
def webhook_handler(event):
    room_name = event["room"]["name"]
    new_identity = event["participant"]["identity"]

    # 2. Identify agent - adjust logic to match how you name/mark agents
    agent_identity = find_agent_identity(room_name)
    if agent_identity:
        # 3. Remove only the agent
        remove_agent_from_room(room_name, agent_identity)

# Helper: find agent identity (example: look for identity prefix "agent_")
def find_agent_identity(room_name):
    participants = list_participants(room_name)
    for p in participants:
        if p["identity"].startswith("agent_"):
            return p["identity"]
    return None

Server SDK call to remove a participant (Python) • Use the LiveKit server API client to remove a single participant by identity. • Call the remove participant endpoint for the target room and identity (the exact client method name depends on the SDK bindings you use; conceptually it is

remove_participant(room_name, identity)

). If you cannot use webhooks and must poll • Periodically list participants for the room. • When you detect a new non-agent participant (compare to previous snapshot), run the same remove flow to evict the agent only. Notes & best practices • Identify the agent reliably: use a fixed identity (e.g.,

agent_bot

) or set participant metadata (e.g.,

role:agent

) so your server can find the agent quickly. • Removing a participant does not delete the room or affect other participants. • Removing is a server-side operation—don’t disconnect the entire room. If you want, I can: • Provide a concrete, runnable Python snippet using the exact LiveKit Python Server SDK methods (I’ll need to know whether you use the official Python SDK or a REST call). • Show webhook verification and example payload handling. • Show the polling implementation if webhooks aren’t possible. Which option do you prefer: webhook or polling? And do you want a full Python code sample using the LiveKit Python Server SDK or a direct REST call example? Sources: server-sdk-js | livekit/livekit_composite | DeepWiki | CreateRoom() is Taking Too Long

how to connect a another agent after remove the existing agent

Thanks — I’ll show two clean ways to replace an agent in a LiveKit room using Python: a lightweight swap (preferred when you only change agent logic) and a full session restart (when you need different STT/TTS/config). I’ll also include how to trigger this after you remove the existing agent when a new participant joins. Quick question before a runnable sample • Are you using the LiveKit Agent APIs (`AgentSession`/agent framework) or a plain participant that you manage with the Server SDK? If you’re using the Agent framework, the examples below map directly; if not, tell me and I’ll adapt the Server SDK/REST approach. Option A — Lightweight agent swap (recommended) • Use

session.update_agent(new_agent)

to swap agent logic without disconnecting the participant or closing the room. • This preserves connection state and is fast. Example outline (Agent framework)

# assume session is an active AgentSession already started in the room
# when you detect a new participant, create the new agent logic and update:

new_agent = Agent(instructions="You are Agent 2...")
await session.update_agent(new_agent)

When to use: • You only need to change the agent’s behavior/instructions or LLM prompt. • STT/TTS and other session resources remain the same. Option B — Full session restart (use when you need different models/config) • Close the current session, then create and start a new AgentSession that connects to the same room. Example outline (Agent framework)

# graceful shutdown of current agent session
await session.aclose()   # or ctx.shutdown(drain=True)

# create new session (can use different STT/LLM/TTS)
new_session = AgentSession(stt=..., llm=..., tts=..., vad=...)
await new_session.start(agent=new_agent, room=ctx.room)

# store new_session for later swaps
session = new_session

When to use: • You need a different audio pipeline, different models, or fully isolated agent state. Triggering replacement when a new participant joins • Detect new participants via webhooks (recommended) or via room event handlers. • Webhook approach: listen for

participant_joined

and then call remove-agent + start-new-agent logic. • In-process approach (inside your Agent job): register a participant event handler and perform the swap there. Example event handler pattern (inside your entrypoint)

@ctx.room.on("participant_connected")
async def on_new_participant(participant):
    # Optionally remove existing agent participant if you previously used remove API
    # Then choose swap method:
    await session.aclose()          # or session.update_agent(new_agent)
    new_session = AgentSession(...)
    await new_session.start(agent=new_agent, room=ctx.room)

Notes & best practices • You do not need to delete the room; replacing the agent keeps the room and other participants intact. • Identify agents reliably (fixed identity like

agent_bot

or metadata such as

role=agent

) so your server can find and remove/swap the correct participant. • Prefer

update_agent()

for fast, in-place swaps when only agent logic changes. • Use

await session.aclose()

or

ctx.shutdown(drain=True)

for clean shutdowns when restarting the session. • If you need exact code using the LiveKit Python Server SDK methods (or a direct REST call), tell me: do you want a full runnable snippet, webhook verification code, or polling-based detection? Sources: Job lifecycle | LiveKit Documentation | Agents and handoffs | LiveKit Documentation | How to do call transfers with Five9 | LiveKit