/**
 * Isomorphic core package.json manipulation functionality
 * Works with provided package.json data without Node.js filesystem dependencies
 */
import Version from './version.js';
/**
 * Package data interface
 */
export interface PackageData {
    [key: string]: any;
}
/**
 * Options for creating a new PkgCore instance
 */
export interface PkgCoreOptions {
    data?: PackageData;
}
/**
 * Isomorphic package manipulation class
 * Works with provided package.json data without filesystem dependencies
 */
export declare class PkgCore {
    version: Version;
    private _data;
    constructor(data?: PackageData | PkgCoreOptions, options?: PkgCoreOptions);
    /**
     * Get the current package data
     */
    get data(): PackageData;
    /**
     * Set a property value using dot notation
     * @param prop - Property path (e.g., 'author.name')
     * @param value - Value to set
     * @returns This instance for chaining
     */
    set(prop: string, value: unknown): this;
    /**
     * Get a property value using dot notation
     * @param prop - Property path (e.g., 'author.name')
     * @param defaultValue - Default value if property doesn't exist
     * @returns Property value
     */
    get(prop: string, defaultValue?: unknown): unknown;
    /**
     * Update a property using a function
     * @param prop - Property path
     * @param fn - Function to transform current value
     * @returns This instance for chaining
     */
    update(prop: string, fn: (currentValue: unknown) => unknown): this;
    /**
     * Append value to an array property
     * @param prop - Property path
     * @param value - Value to append
     * @returns This instance for chaining
     */
    append(prop: string, value: unknown): this;
    /**
     * Prepend value to an array property
     * @param prop - Property path
     * @param value - Value to prepend
     * @returns This instance for chaining
     */
    prepend(prop: string, value: unknown): this;
    /**
     * Delete a property
     * @param prop - Property path to delete
     * @returns This instance for chaining
     */
    del(prop: string): this;
    /**
     * Check if a property exists
     * @param prop - Property path to check
     * @returns True if property exists
     */
    has(prop: string): boolean;
    /**
     * Get the package.json content as a formatted string
     * @param space - Number of spaces for indentation (default: 2)
     * @returns Formatted JSON string
     */
    stringify(space?: number): string;
}
export default PkgCore;
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