/** Locate the real `claude` binary path (not our wrapper). */
export declare function findClaude(selfUrl: string): string;
/** Read a line from stdin without echoing it (TTY) or from a pipe (non-TTY). */
export declare function promptSecret(question: string): Promise<string>;
/** Resolve a target alias/fuzzy string to a single saved email, or throw.
 *  Used by apikey commands so they accept the same target syntax as switch. */
export declare function resolveTargetEmail(target: string, accountsDirPath: string): string;
/** Prompt for y/n on stderr and return true if the user typed y or Y. */
export declare function askYN(question: string): Promise<boolean>;