Developed and delivered the Vesper Desktop Theme for the sst/opencode repository, introducing both Light and Dark modes with detailed color configurations for headers, sidebars, controls, and content areas. This feature enhanced the application's user experience and accessibility by enabling seamless theme toggling and ensuring visual consistency throughout the interface. The implementation was completed in a single, feature-focused commit with collaborative input from a co-author, emphasizing clear traceability and knowledge sharing. Leveraging TypeScript and front end development skills, along with JSON for configuration, the work demonstrated a thoughtful approach to UI/UX design and addressed the need for customizable, accessible themes.