#!/usr/bin/env node
import type { Stream } from "node:stream";
export type WritableStream = Stream & NodeJS.WritableStream;
/**
 * CLI IO interface with stdout and stderr.
 */
export interface IO {
    stdout: WritableStream;
    stderr: WritableStream;
}
/**
 * Main function.
 *
 * @param args - The command line arguments (`process.argv.slice(2)`)
 * @param io   - Optional custom stdout/stderr streams. Defaults to Node.js `process`.
 * @returns The exit code
 */
export declare function main(args: string[], io?: IO): Promise<number>;