Mannapriyam worked on the BerriAI/litellm repository, focusing on enhancing UI security by changing the default key type from 'default' to 'llm_api' throughout the onboarding and usage flows. Using React for front end development and leveraging both JavaScript and TypeScript, Mannapriyam updated form logic and UI components to ensure consistent handling of the new key type. This targeted feature addressed a specific security risk by eliminating insecure default credential paths and aligning the application with established security policies. The work demonstrated a focused approach to maintainability and risk reduction, though it was limited in scope to a single feature over one month.