Worked on the nodejs/node repository to deliver a performance optimization for package management in Node.js environments. Developed a new lookup function in C++ and JavaScript that locates the nearest parent package.json file, incorporating permission checks to enhance security. The implementation reduced cache size for package configuration reads and minimized filesystem I/O, resulting in lower memory usage and faster lookups. This feature improved the efficiency and reliability of package resolution workflows. The work was tracked through a dedicated commit, demonstrating end-to-end ownership from design to code integration, and aligned closely with existing Node.js packaging mechanisms to maintain code quality.