import type { FlowSessionRuntime, FlowSessionScheduler } from './flowSessionScheduler.js';
import { type InteractiveStateDef, type InteractiveStateOption } from './interactiveStates.js';
import type { RoutePreviewCache } from './routePreview.js';
import type { RoutePreviewKeyRuntime } from './framePreviewKeys.js';
import type { PageModel } from './store.js';
/** Computes the exact selection recipe without mutating the current frame. */
export declare function deriveInteractiveVariantIdentity(page: PageModel, def: InteractiveStateDef, option: InteractiveStateOption, defs?: readonly InteractiveStateDef[]): PageModel | null;
export interface InteractiveVariantPrefetchCandidate {
    axisId: string;
    optionId: string;
    /** The recipe key the option's real selection would publish under. */
    cacheKey: string;
    /** Hypothetical identity handed to prefetchPageInteractiveVariant. */
    variantPage: PageModel;
}
/**
 * One editor's speculative variant prefetch: the kill switch, the debounce,
 * the active round, and the subscription to its interactive runner. Bound to
 * one runtime and its flow-session scheduler.
 */
export declare function createVariantPrefetch(runtime: FlowSessionRuntime, flows: Pick<FlowSessionScheduler, 'interactiveSessionRunnerIsIdle' | 'interactiveSessionTracksVariant' | 'prefetchPageInteractiveVariant' | 'subscribeInteractiveSessions'>): {
    planInteractiveStatePrefetch: (keyRuntime: RoutePreviewKeyRuntime & {
        readonly previews: Pick<RoutePreviewCache, "hasRoutePreviewSnapshot">;
    }, page: PageModel, previewRevision: string, limit?: number) => InteractiveVariantPrefetchCandidate[];
    setInteractiveStatePrefetchEnabled: (enabled: boolean) => void;
    interactiveStatePrefetchEnabled: () => boolean;
    setInteractiveStatePrefetchDebounceMs: (ms: number) => void;
    __variantPrefetchDebug: {
        requested: number;
        rounds: number;
        queued: number;
        exhausted: number;
        unavailable: number;
    };
    startInteractiveStatePrefetch: (page: PageModel, previewRevision: string) => void;
    cancelScheduledInteractiveStatePrefetch: () => void;
    requestInteractiveStatePrefetch: (page: PageModel, previewRevision: string) => () => void;
};
export type VariantPrefetch = ReturnType<typeof createVariantPrefetch>;