/**
 * Utilities for resolving package.json entry points.
 * @internal
 */
import type { ResolvedEntryPoints } from '../types';
/**
 * Represents the relevant fields from package.json.
 */
interface PackageJson {
    main?: string;
    types?: string;
    typings?: string;
    module?: string;
    exports?: PackageExports;
}
/**
 * Package.json exports field can be complex.
 */
type PackageExports = string | {
    [key: string]: PackageExports | string | undefined;
} | undefined;
/**
 * Finds the nearest package.json by searching upward from a directory.
 *
 * @param startDir - Directory to start searching from
 * @returns Path to package.json if found, undefined otherwise
 */
export declare function findPackageJson(startDir: string): string | undefined;
/**
 * Loads and parses a package.json file.
 *
 * @param pkgPath - Path to the package.json file
 * @returns Parsed package.json or null if file cannot be read
 */
export declare function loadPackageJson(pkgPath: string): PackageJson | null;
/**
 * Resolves all entry points from a package.json.
 *
 * @param pkgPath - Path to the package.json file
 * @returns Resolved entry points with absolute paths
 */
export declare function resolveEntryPoints(pkgPath: string): ResolvedEntryPoints;
/**
 * Checks if a file is a package entry point.
 *
 * @param filePath - Absolute path to the file being checked
 * @param pkgPath - Path to the package.json
 * @returns True if the file is an entry point
 */
export declare function isEntryPoint(filePath: string, pkgPath: string): boolean;
/**
 * Clears the package.json cache. Useful for testing.
 */
export declare function clearPackageJsonCache(): void;
export {};
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