import type { Asset, AssetListFilter, AssetStorage } from '@lit-pigeon/core';
export interface FsAssetStorageOptions {
    /** Directory in which asset metadata JSON files live. Defaults to `~/.lit-pigeon/assets`. */
    dir?: string;
}
/**
 * Filesystem-backed `AssetStorage` — one JSON metadata file per asset.
 * The asset *file* lives wherever `Asset.src` points (S3, CDN, file://);
 * this storage layer only manages the catalog metadata so any upload
 * pipeline can plug in.
 */
export declare class FsAssetStorage implements AssetStorage {
    readonly dir: string;
    constructor(opts?: FsAssetStorageOptions);
    private filePath;
    private ensureDir;
    private readFile;
    private readAll;
    list(filter?: AssetListFilter): Promise<Asset[]>;
    get(id: string): Promise<Asset | null>;
    save(asset: Asset): Promise<void>;
    delete(id: string): Promise<void>;
    listFolders(): Promise<string[]>;
}
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