During two months on the zed-industries/gemini-cli and google-gemini/gemini-cli repositories, Lyon Kim developed and unified focus-aware cursor management and UI state frameworks to enhance terminal user experience. He introduced custom React hooks and context-based state management in TypeScript and JavaScript, enabling the CLI to dynamically hide the cursor when unfocused and to configure UI components like footers for improved accessibility. Lyon also automated code quality processes by implementing pre-commit hooks for linting and formatting, streamlining collaboration and reducing regressions. His work emphasized maintainable, consistent UI behavior and robust DevOps practices, addressing both user experience and codebase reliability.