Worked on the zed-industries/gemini-cli repository to enhance the Google Credentials transport layer, focusing on maintainability and extensibility. Introduced support for the X-Goog-User-Project header and implemented request initialization with headers, enabling more flexible API interactions. Centralized the transport creation logic based on server configuration, which reduced code duplication and streamlined future updates. Refactored the createTransport function to further minimize redundant code, simplifying ongoing maintenance. The work leveraged TypeScript for type safety and clarity, with a strong emphasis on API development and integration. These changes improved the structure and reliability of the credentials transport system within the project.