/** Discriminator for `CLIError`, used by tests and the dispatcher. */
export type CLIErrorCode = "NOT_AUTHENTICATED" | "USER_CANCELLED" | "ALREADY_AUTHENTICATED" | "OAUTH_FAILED" | "KEYCHAIN_FAILURE";
/**
 * Thrown from a verb's `run` to signal a known failure. The
 * dispatcher writes `message` to stderr and exits with `exitCode`.
 */
export declare class CLIError extends Error {
    readonly code: CLIErrorCode;
    readonly exitCode: number;
    constructor(code: CLIErrorCode, message: string);
}
/** Returns the `message` of an `Error`, or its `String` coercion otherwise. */
export declare function describeError(err: unknown): string;