/**
 * Create a tar.gz archive from a list of file descriptors.
 * For in-memory content (like _metadata.json), writes temp files first.
 */
export declare function createArchive(files: Array<{
    name: string;
    content?: Buffer | string;
    sourcePath?: string;
}>, outputPath: string): Promise<void>;
/**
 * Extract a tar.gz archive to a destination directory.
 */
export declare function extractArchive(archivePath: string, destDir: string): Promise<void>;
/**
 * Read a single file from a tar.gz archive.
 * Returns the file content as a Buffer, or null if not found.
 */
export declare function readFileFromArchive(archivePath: string, filename: string): Promise<Buffer | null>;
/**
 * List all entries in a tar.gz archive.
 */
export declare function listArchiveEntries(archivePath: string): Promise<string[]>;