Using

session.generate_reply

inside a

session.on("conversation_item_added")

handler can indeed lead to an infinite loop, even when filtering for messages with the role "user." Here’s why: •

generate_reply

does add a conversation item with the role "assistant". Your filter prevents the handler from firing again directly on assistant messages. • However, infinite loops can still arise indirectly: if there’s any logic elsewhere (or in future modifications) that adds new user messages programmatically within the same or subsequent replies, those would trigger your handler again, causing recursion. • The framework supports programmatically injecting user input (e.g.,

session.generate_reply(user_input="...")

), which would re-enter your role-based handler if not controlled. To avoid infinite loops: ensure you’re not programmatically adding user messages within this or other linked handlers, implement state tracking to prevent re-entrancy, and consider limiting the recursion depth or generation cycles explicitly. Sources: livekit-agents/livekit/agents/voice/agent_activity.py