/**
 * CLI failure with a controlled exit code. Always rendered as a clean,
 * stack-free message (the stack only appears under --debug).
 */
export declare class CliError extends Error {
    readonly exitCode: number;
    constructor(message: string, exitCode?: number);
}
/**
 * Render any thrown value to stderr per the cli-config spec: human-readable
 * message, no stack trace unless `debug`, and return the process exit code.
 */
export declare function renderError(error: unknown, io: {
    err(line: string): void;
}, debug: boolean): number;
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