Worked on the gemini-cli repositories, focusing on stability, reliability, and maintainability of CLI tools. Addressed a tmux-specific startup crash by refining header rendering logic and expanding scenario-based tests, ensuring robust operation across environments. Enhanced test coverage throughout core, authentication, privacy, and UI components to reduce regressions and improve code quality. Standardized exit codes and error handling for clearer user feedback and easier debugging. In December, implemented resilient network request retry logic to handle transient errors, improving CLI reliability under unstable connectivity. Leveraged JavaScript, TypeScript, and Node.js, applying skills in backend development, error handling, and comprehensive unit testing.