export declare const MODEL_RESOURCE_CACHE_NAME = "u-space-model-loader-cache-v2";
export declare const DEFAULT_MODEL_CACHE_POLICY: Readonly<{
    maxAgeMs: number;
    maxEntries: 64;
    maxBytes: number;
}>;
export interface ModelCachePolicy {
    maxAgeMs: number;
    maxEntries: number;
    maxBytes: number;
}
export type ModelCacheMode = 'no-store' | 'reload' | 'revalidate' | 'force-cache';
export interface ModelResourceLoadOptions {
    persistent?: boolean;
    /** Bypass, refresh, validate, or force use of the persistent resource cache. */
    cacheMode?: ModelCacheMode;
    /** Caller-controlled cache identity for versioned resources at one URL. */
    cacheKey?: string;
    headers?: HeadersInit;
    credentials?: RequestCredentials;
    signal?: AbortSignal;
    policy?: Partial<ModelCachePolicy>;
}
export interface LoadedModelResource {
    url: string;
    buffer: ArrayBuffer;
    headers: Headers;
    status: number;
    statusText: string;
    fromCache: boolean;
}
export declare function loadModelResource(url: string, options?: ModelResourceLoadOptions): Promise<LoadedModelResource>;
export declare function deleteModelResourceCache(url: string, options?: Pick<ModelResourceLoadOptions, 'headers' | 'credentials' | 'cacheKey'>): Promise<void>;
export declare function clearModelPersistentCache(): Promise<void>;
export declare function modelPersistentCacheAvailable(): boolean;