interface UseMeasuredCardRectsResult {
    /** Ref callback to attach to the diagram's outer container element. */
    containerRef: (element: HTMLDivElement | null) => void;
    /** Returns a ref callback for the source card at `index`; attach one per card. */
    setSourceCardRef: (index: number) => (element: HTMLDivElement | null) => void;
    /** Ref callback to attach to the target card element. */
    setTargetCardRef: (element: HTMLDivElement | null) => void;
    /** One connector path `d` string per source, in the same order as the sources. */
    connectorPaths: string[];
}
/**
 * Measures the container, every source card, and the target card via
 * `getBoundingClientRect`, and derives the fan-in connector paths between
 * them. Re-measures whenever any of those elements resize (via
 * `ResizeObserver`), so the diagram keeps its connectors aligned as cards
 * reflow. The geometry itself lives in the pure `computeConnectorPaths`
 * util — this hook only owns refs, measurement, and re-measurement timing.
 */
export declare const useMeasuredCardRects: (sourceCount: number) => UseMeasuredCardRectsResult;
export {};