Worked on the wix-incubator/repluggable repository to enhance application stability by introducing AppHost entry-point verification. Focused on preventing runtime errors caused by unavailable APIs, the work involved designing a verification mechanism that detects entry points waiting for APIs that will never become available. This solution included adding a new method to the AppHost interface, implementing its logic, and developing comprehensive unit tests to validate the behavior. Utilizing TypeScript, JavaScript, and strong API design principles, the changes enabled safer API boundary evolution and reduced production incidents related to unready entry points, supporting more reliable and maintainable deployments for the project.