import type { StaticAssetSource } from '@fluojs/http';
/** Precompressed representation policy for a Node filesystem asset source. */
export type NodeFileSystemAssetPrecompression = boolean | {
    /** Whether `.br` siblings may be selected. Defaults to `true`. */
    readonly brotli?: boolean;
    /** Whether `.gz` siblings may be selected. Defaults to `true`. */
    readonly gzip?: boolean;
};
/** Configuration for a Node filesystem-backed static asset source. */
export interface NodeFileSystemAssetSourceOptions {
    /** Existing directory that contains all served asset files. */
    readonly root: string;
    /** Optional precompressed sibling selection policy. Defaults to `false`. */
    readonly precompressed?: NodeFileSystemAssetPrecompression;
}
/**
 * Creates a Node-only filesystem source for {@link StaticAssetSource}.
 *
 * @param options Existing root directory and optional precompressed sibling policy.
 * @returns An explicit portable source that eagerly snapshots each verified
 * selected file into memory, closes its `FileHandle`, and replays only that
 * immutable byte snapshot through `StaticAsset.source`.
 * @throws {TypeError} When the root is empty, missing, or not a directory.
 */
export declare function createNodeFileSystemAssetSource(options: NodeFileSystemAssetSourceOptions): StaticAssetSource;
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