Developed and integrated the Cassette Futurism theme as a new submodule within the zed-industries/extensions repository, delivering both dark and light mode variants to expand customization options for users. Leveraged configuration management skills to update .gitmodules and extensions.toml, ensuring seamless registration and deployment of the extension. Documented local validation steps and prepared the theme for continuous integration packaging, supporting reproducible builds and efficient deployment workflows. Utilized Git submodules and TOML to manage repository structure and configuration, focusing on maintainability and scalability. The work emphasized clear documentation and readiness for Linux CLI packaging, contributing to faster time-to-market for new themes.