export type OutputFormat = 'json' | 'human' | 'raw';
/**
 * Parse --output flag from argv.
 * Returns 'json' as default when not specified.
 */
export declare function parseOutputFormat(argv: string[]): OutputFormat;
/** BigInt-safe JSON stringify */
export declare function toJson(data: unknown, pretty?: boolean): string;
/** Read a single line from stdin (for --data - support) */
export declare function readStdin(): Promise<string>;
/** Resolve a flag value, reading from stdin if value is '-' */
export declare function resolveStdinFlag(value: string): Promise<string>;
/** Check if running in interactive TTY mode (both stdin and stdout) */
export declare function isTTY(): boolean;
/** Prompt user for yes/no confirmation in TTY mode */
export declare function confirmAction(message: string): Promise<boolean>;
/** Format key-value record as aligned table */
export declare function toHuman(data: Record<string, unknown>, title?: string): string;