Worked on enhancing the obsidianmd/obsidian-releases repository by delivering visual theming improvements focused on user customization and reliable theme previews. Developed and integrated the Base16 Default Dark Theme, reorganizing the theme index to improve navigation and maintainability. Implemented screenshot validation using JSON to ensure that theme previews accurately reflect the intended design, addressing consistency in screenshot sizing and representation. Applied UI/UX design and front end development skills to create a more predictable and user-friendly theming experience. These updates established a solid foundation for future theme additions, emphasizing maintainable structure and usability within the repository’s theme management workflow.