import { BrowserFsDuplex } from "./browser.js";
declare global {
    interface Window {
        harness: BrowserTestHarness;
    }
}
declare class BrowserTestHarness {
    duplex: BrowserFsDuplex<any, "handler"> | null;
    private directoryHandle;
    private logContainer;
    private statusHeader;
    private actionButton;
    constructor();
    initialize(filenamePrefix: string): Promise<void>;
    destroy(): Promise<void>;
    private logEventToUI;
    private updateStatus;
    logEvent(event: string, payload?: any): void;
}
export {};
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