Both

context.session.generate_reply

and

context.session.say

update the chat context in LiveKit: •

session.say()

: By default, this method adds the text to the agent's chat context after playback (unless the

add_to_chat_ctx

parameter is set to

False

). This message becomes part of the conversation history. •

session.generate_reply()

: This method's effect on chat context depends on the parameters used: ◦ If you use

user_input

, it is added as a user message in the chat history. ◦ If you use

instructions

, the resulting agent response is added to history, but the instructions themselves are not. Both methods result in new messages being persisted to the chat context items, and corresponding conversation events are triggered. The messages are role-assigned ("assistant" for agent responses, "user" for user inputs). Sources: Agent speech and audio | LiveKit Docs | tests/test_agent_session.py