Worked on the open-feature/js-sdk-contrib repository, focusing on improving runtime reliability for client applications by addressing a critical issue in SSE event stream URL caching. Delivered a targeted bug fix using TypeScript and front end development skills, ensuring that event stream URLs are now properly stored in cache. This technical approach allows the application to reconnect to the correct event streams after cache loads or 304 responses, directly reducing downtime and preventing user-visible outages in SSE-powered features. Emphasized robust testing practices to validate the solution, aligning the caching mechanism with broader reliability goals and enhancing overall streaming stability for users.