export type HarnessDragMessage = {
    kind: 'begin' | 'move';
    id: string;
    x: number;
    y: number;
} | {
    kind: 'end';
    id: string;
};
export interface HarnessDragBridge {
    send(message: HarnessDragMessage): void;
}
/** Read upstream semantic DOM only; no patches, node moves or injected CSS. */
export declare function isHarnessWindowDragPoint(doc: Document, target: Element, x: number, y: number): boolean;
export declare function watchHarnessWindowDrag(surface: HTMLElement, frame: HTMLIFrameElement, bridge?: HarnessDragBridge | undefined): () => void;
//# sourceMappingURL=harness-window-drag.d.ts.map