import type { DocumentEngine } from '../document/contracts.js';
import type { DataFixtureContext, HostDataCapabilities } from './contracts.js';
export declare function useDataPreviewSelection(engine: DocumentEngine, capabilities: HostDataCapabilities, screenId: string): {
    fixtureId: string | undefined;
    selectFixture: (fixtureId: string) => void;
};
/** Async fixture state stays outside the authoring document and command history. */
export declare function useDataProjection(engine: DocumentEngine, capabilities: HostDataCapabilities, screenId: string, fixtureId: string | undefined): {
    projection: import("./preview.js").DataProjection | null;
    fixture: DataFixtureContext | undefined;
    error: string | undefined;
    retry: () => void;
    status: "error" | "unavailable" | "ready" | "loading";
};