import { Middleware } from '../types';
/**
 * Middleware that logs request signals such as method, path, status, duration, and IP.
 *
 * By default, logs with `info` level, meaning output may be suppressed if the current
 * logger level is higher. If `force` is `true`, it logs regardless of the level using `print`.
 *
 * This is useful for monitoring internal requests without polluting production logs
 * unless explicitly desired.
 *
 * @param force - If `true`, logs are always printed; otherwise, logged as debug.
 * @returns Middleware function to measure and log request signal data.
 *
 * @example
 * app.use(signals(true)); // Always log requests signals
 */
export declare const signals: (force?: boolean) => Middleware;