import type { PlacementEntry } from "../../core/index.js";
export interface SlotPlacement {
    /** The placement in this slot, or undefined when the slot is empty. */
    entry: PlacementEntry | undefined;
    error: Error | undefined;
    isLoading: boolean;
    refresh(): Promise<void>;
}
/** Subscribe one slot to the shared poller. `enabled: false` starts nothing. */
export declare function usePlacements(slotId: string, enabled?: boolean): SlotPlacement;
/** Tell the registry this slot exists, so a surface that is NOT on this page
 *  (the "Add to…" picker) can offer it as a destination. Effect-time only, so
 *  an SSR render reports nothing; deduped and batched by the shared poller. */
export declare function useReportSlot(slotId: string, label: string, enabled: boolean, description?: string): void;