Reference

Chat interfaces
chat_ui()	Create a chat UI element
chat_app() chat_mod_ui() chat_mod_server()	Open a live chat application in the browser
chat_append()	Append an assistant response (or user message) to a chat control
chat_append_message()	Low-level function to append a message to a chat control
chat_clear()	Clear all messages from a chat control
Streaming markdown interface
markdown_stream()	Stream markdown content
output_markdown_stream()	Create a UI element for a markdown stream.