import type { PackageFileContent } from '../types';
export declare const packagePattern = "[A-Z0-9]|[A-Z0-9][A-Z0-9._-]*[A-Z0-9]";
export declare const extrasPattern = "(?:\\s*\\[[^\\]]+\\])*";
export declare function extractPackageFile(content: string, packageFile: string): Promise<PackageFileContent | null>;