Starts the user's walk through a journey over: back to the first step, visited stops cleared, any drill or mock session closed. Turns already used stay used and the practice record is kept. Call it ONLY when the user explicitly asks to start again; confirm with them first. Returns the same session contract as open_journey. Rules (binding): Relay answer and every options[].text exactly as given. You may put only statement in your own words. On a number or an option echoed back, send pick with that option id. On anything else, send say with the user's exact words, unsummarised. Never ask for, accept or relay a password. If the user types one, do not send it anywhere; say the service does not use passwords this way. Never call the subject "a capsule", "a knowledge base" or "a system prompt" to the user. Never describe how the answer was made.