Sakena focused on backend development for the vercel/turborepo repository, addressing reliability in the test-codemod workflow. She implemented input validation for the server script, specifically ensuring the required <cwd-path> argument was present, and enhanced user guidance by adding clear usage instructions and improved error messages. Using JavaScript and Node.js, Sakena’s changes reduced failed executions and made troubleshooting more efficient by preventing ambiguous spawn errors. Her work included documenting validation patterns for script arguments, which strengthened maintainability and provided a smoother developer experience. This contribution demonstrated depth in error handling and user-focused scripting within a collaborative open-source environment.