/**
 * An error whose message is meant for the user, not a stack trace.
 * cli.ts prints the message and exits with `exitCode`.
 *
 * `code` is a short machine-readable category (`not_logged_in`, `unreachable`,
 * `pro_expired`, ...) for the command-outcome report the CLI sends to api-server
 * (telemetry/report.ts). It is deliberately NOT the message: messages name
 * paths, games and balances, and none of that belongs in an analytics event.
 * Optional, because most refusals are one-of-a-kind and are counted under the
 * generic bucket by exit code alone; set it at the shared throw sites — the
 * http client, the session — where one line classifies a whole family.
 */
export declare class CliError extends Error {
    readonly exitCode: number;
    readonly code: string | undefined;
    constructor(message: string, exitCode?: number, code?: string);
}
/**
 * The `code` off a Node fs/child-process error, without pulling in the NodeJS global namespace.
 *
 * Shared because both copies existed to answer the same question — "is this the ENOENT I have a
 * sentence for, or something I must not swallow?" — and a lane that maps only the codes it thought
 * of lets the rest escape as a raw stack trace, past whatever guarantee its command documents.
 */
export declare function errnoCode(error: unknown): string | undefined;
/** The errno, or the message when there is none — so no failure mode is left unmapped. */
export declare function describeErrno(error: unknown): string;