import { VfsBackend } from '../core/types';
export interface OpfsFsOptions {
    /** Root directory name within OPFS. Default: "texlive-wasm". */
    rootName?: string;
    /**
     * Namespace the cache by the TL build it belongs to (the manifest's
     * `version`). Files cached for one build are not valid for another — and an
     * unversioned cache is a place for one document's poisoned download to
     * outlive it. Default: "unversioned", which keeps pre-existing caches
     * readable.
     */
    version?: string;
}
/** VfsBackend plus the write-through hook FetchFS feeds (see vfs/index.ts). */
export interface OpfsBackend extends VfsBackend {
    /** Persist a fetched file into the cdn/ cache tier. Failures are swallowed. */
    write(tdsPath: string, bytes: Uint8Array): Promise<void>;
}
export declare function createOpfsFs(opts?: OpfsFsOptions): Promise<OpfsBackend>;
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