export default AsyncTracker;
export type AsyncHookItem = {
    /**
     * - Unique async ID.
     */
    key: number;
    /**
     * - Async type (e.g., 'PROMISE').
     */
    type: string;
    /**
     * - Triggering async ID.
     */
    triggerAsyncId: number;
    /**
     * - Call stack at init.
     */
    stack: string;
    /**
     * - Associated resource (e.g., Promise).
     */
    resource: any;
};
export type SystemTypes = "PROMISE" | "TIMEOUT" | "PROCESSNEXTTICK" | "TICKOBJECT" | "SCRIPT" | "QUERYWRAP" | "FILEHANDLE" | "HTTP2SESSION" | "HTTP2STREAM" | "ZLIB" | "UDPSENDWRAP" | "WRITEWRAP" | "SHUTDOWNWRAP" | "PROMISEEXECUTOR" | "TCPCONNECTWRAP" | "GETADDRINFOREQWRAP" | "GETNAMEINFOREQWRAP" | "IMMEDIATE" | "TCPWRAP" | "TCPSERVERWRAP" | "UDPWRAP" | "FSREQCALLBACK" | "HTTPPARSER" | "PIPEWRAP" | "PIPECONNECTWRAP" | "STREAMWRAP" | "TTYWRAP" | "PROCESS" | "SIGNALWRAP" | "TIMERWRAP";
/**
 * Tracks unresolved async operations using Node's async_hooks.
 *
 * Detects leaks like hanging Promises, Timers. Used by {@link Test}.
 *
 * @example
 * const tracker = new AsyncTracker();
 * tracker.enable('PROMISE');
 * // Run code...
 * console.log(tracker.report(true)); // Unresolved count + details
 */
declare class AsyncTracker {
    /**
     * Enables tracking (optionally filter by type).
     *
     * @param {SystemTypes} [type] - Filter to specific type (e.g., 'PROMISE').
     * @throws {Error} Unknown type.
     * @example
     * tracker.enable('PROMISE');
     */
    enable(type?: SystemTypes): void;
    /**
     * Disables tracking.
     *
     * @example
     * tracker.disable();
     */
    disable(): void;
    /**
     * Clears tracked items.
     *
     * @example
     * tracker.reset();
     */
    reset(): void;
    /**
     * Reports unresolved count (+ verbose details).
     *
     * @param {boolean} [verbose=false] - Print stack/resource per item.
     * @returns {number} Unresolved count.
     * @example
     * if (tracker.report(true) > 0) console.error('Leaks!');
     */
    report(verbose?: boolean): number;
    /**
     * Gets unresolved items (filtered).
     *
     * Temporarily disables hook during query.
     *
     * @param {SystemTypes} [type] - Filter type.
     * @returns {AsyncHookItem[]} Array of items.
     * @example
     * const leaks = tracker.getUnresolved('PROMISE');
     */
    getUnresolved(type?: SystemTypes): AsyncHookItem[];
    /**
     * Gets description for type.
     *
     * @param {SystemTypes} type - Type.
     * @returns {string} Description.
     * @throws {Error} Unknown.
     * @example
     * tracker.getTypeDescription('PROMISE'); // 'Promise'
     */
    getTypeDescription(type: SystemTypes): string;
    /**
     * Registers custom type description.
     *
     * @param {string} type - Type key (uppercased).
     * @param {string} description - Description.
     * @example
     * tracker.addCustomType('MYTYPE', 'My async op');
     */
    addCustomType(type: string, description: string): void;
    #private;
}