interface PackageJson {
    dependencies?: {
        next?: string;
        [key: string]: string | undefined;
    };
    devDependencies?: {
        next?: string;
        [key: string]: string | undefined;
    };
}
interface VersionResult {
    version: string;
    majorVersion: number;
    isNextjs15OrHigher: boolean;
    error?: string;
}
/**
 * Gets the Next.js major version from package.json
 * @param projectPath - Path to the project root directory
 * @returns Promise containing version information and status
 */
declare function getNextjsVersion(projectPath?: string): Promise<VersionResult>;
export { getNextjsVersion, VersionResult, PackageJson };
export declare function checkNextVersion(): Promise<boolean | undefined>;