Worked on the better-auth/better-auth repository to deliver Vercel as a new OAuth provider, expanding authentication options and streamlining setup for developers. Integrated the provider into the existing authentication flow using TypeScript, ensuring secure handling of environment variables and maintaining backward compatibility. Focused on frontend development and OAuth standards, the implementation included comprehensive documentation updates to guide users through configuration and usage. No critical bugs were reported during this period, reflecting a stable and production-ready authentication module. This work demonstrated attention to secure configuration, clear developer documentation, and robust integration practices within a modern TypeScript-based authentication system.