@package is a TypeScript utility for reading and manipulating the root project's package.json file and forming paths relative to it. It's designed for developers working with Node.js projects, especially those using Yarn workspaces, who need programmatic access to package.json data and file system operations relative to the project root. The library provides type-safe access to package.json fields, defines custom project structures, and offers functions for checking file existence and reading/writing files.