chat_app                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
chat_restore            Add Shiny bookmarking for shinychat
chat_ui                 Create a chat UI element
contents_shinychat      Format ellmer content for shinychat
markdown_stream         Stream markdown content
output_markdown_stream
                        Create a UI element for a markdown stream.
update_chat_user_input
                        Update the user input of a chat control
