Worked on the zed-industries/gemini-cli and google-gemini/gemini-cli repositories to deliver robust improvements in diff rendering, file discovery, and configuration management. Enhanced the reliability of diff generation by unifying edit handling and expanding unit test coverage for multi-hunk diffs. Centralized file discovery and ignore filtering using a dedicated service, optimizing performance and maintainability while supporting both .geminiignore and the newly added .aiexclude exclusion files. Streamlined CLI configuration by removing redundant options and helpers. Leveraged TypeScript, Node.js, and asynchronous programming to improve error handling, file manipulation, and testing, resulting in faster, safer feature delivery across the CLI projects.