/**
 * Node.js-specific package.json manipulation with filesystem operations
 * Extends the isomorphic core with file I/O capabilities
 */
import { PkgCore, PkgCoreOptions } from './core.js';
/**
 * Options for creating a new Pkg instance
 */
export interface PkgOptions extends PkgCoreOptions {
    create?: boolean;
}
/**
 * Node.js package manipulation class with filesystem support
 * Extends the isomorphic core with file reading and writing capabilities
 */
export declare class Pkg extends PkgCore {
    options: PkgOptions;
    path: string;
    private _cwd;
    constructor(cwd?: string, options?: PkgOptions);
    /**
     * Save package.json to filesystem asynchronously
     * @returns Promise that resolves when file is written
     */
    save(): Promise<void>;
    /**
     * Save package.json to filesystem synchronously
     * @returns This instance for chaining
     */
    saveSync(): this;
}
export default Pkg;
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