/**
 * Strip terminal control sequences from a warning message before it is
 * masked: ESC-introduced ANSI sequences, C1-CSI-introduced sequences, and
 * every remaining C0/DEL/C1 control character except \t, \n and \r.
 * Strip BEFORE mask (F-R12): a control character inside a credential-shaped
 * value splits the mask regex anchors, so masking must see stripped text.
 */
export declare function stripControlSequences(value: string): string;