Worked on refining React Hook change detection within the facebook/react repository, focusing on composite hooks such as useSyncExternalStore, useTransition, useActionState, and useFormState. Improved the underlying logic so these hooks are now recognized as a single user-facing hook, reducing redundant change reports in React DevTools. This adjustment addressed inaccurate detection and minimized false positives, resulting in clearer DevTools timelines and a smoother debugging process. The solution involved detailed code analysis, debugging, and upstream collaboration through code review and pull requests. Utilized JavaScript and TypeScript to implement and test the patch, demonstrating strong skills in React development and hook management.