You're asking about the purpose of

publish_on_behalf

.

publish_on_behalf

is used to link a media-publishing participant (an "avatar worker") to an agent (the backend agent session) that it represents. Instead of the agent session publishing audio/video directly, the avatar worker publishes those tracks and sets

lk.publish_on_behalf

to the agent's identity. This lets clients: • Associate the avatar worker’s audio/video with the correct agent. • Keep avatar rendering and media publication separated from the agent backend (better sync, lower latency). • Let frontends detect agent media by checking participants of kind

agent

whose

lk.publish_on_behalf

equals the agent identity. If you want, I can show how to detect these participants in your client code or point to the React hook (

useVoiceAssistant

) that retrieves the agent and its tracks automatically. Sources: Virtual avatar plugins | LiveKit Docs