Worked on enhancing the policy attachments deletion workflow in the BerriAI/litellm repository, focusing on improving reliability, user experience, and maintainability. Introduced a controlled deletion process using a DeleteResourceModal and integrated React Query’s useMutation to synchronize UI loading states with mutation status, reducing the risk of stale UI and failed API calls. Added targeted regression and pending-state tests to ensure robust, predictable behavior during deletion, and performed code cleanups to streamline future development. Leveraged JavaScript, TypeScript, and React, with an emphasis on custom hooks and comprehensive testing, to deliver a smoother and safer deletion experience for end users.