Worked on the modelcontextprotocol/ext-apps repository, focusing on front end stability and permission logic reliability. Addressed UI theming consistency by removing a duplicate --color-text-ghost style variable, which reduced the risk of token conflicts and improved interface stability. Enhanced the robustness of permission handling by developing targeted unit tests for the BuildAllowAttribute function, covering edge cases such as undefined, empty, and multiple permission scenarios. Utilized TypeScript, JavaScript, and JSON to implement these changes, emphasizing test-driven development and maintainability. The work supported safer future updates and contributed to a more reliable and consistent user experience across the application.