Andrew Tec worked on upgrading the Catppuccin extension within the zed-industries/extensions repository, focusing on enhancing UI consistency and aesthetics by updating the extension to version 0.2.25. He managed dependency updates and version control using TOML, ensuring that submodule references were aligned with the latest changes from the Catppuccin repository. Andrew validated the build and confirmed compatibility with the existing extension framework, addressing both technical integration and user experience. He also improved traceability by linking relevant commits and release notes, and updated documentation to reflect the changes. The work demonstrated careful attention to dependency management and maintainability.