Login, credential storage, and local status commands.
Tranquilo authenticates with Pronto using the phone OTP flow captured from the app. Credentials are stored in an encrypted local file under Tranquilo's state directory, with non-secret config in the local app config directory.
OTP is allowed only for the Tranquilo login flow. Agents may ask for your phone number and Pronto OTP, then call auth_login_start and auth_login_verify. Never paste access tokens, refresh tokens, UPI details, or payment data into chat.