To wait until a remote participant joins the room before calling

generate_reply()

in the LiveKit Python SDK, you can use the

wait_for_participant()

utility function. This function allows you to either wait for any participant to join or specify a particular participant by their identity. Here's an example:

from livekit.agents.utils.participant import wait_for_participant

# Wait for any participant to join
remote_participant = await wait_for_participant(ctx.room)

# Now that a participant has joined, generate a reply
session.generate_reply(instructions="say hello to the user")

If you want to wait for a specific participant, you can provide their identity:

# Wait for a specific participant
remote_participant = await wait_for_participant(ctx.room, identity="specific_user_id")

The function will return immediately if the participant has already joined the room. Sources: GitHub::livekit::agents | livekit-agents/livekit/agents/utils/participant.p...

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