Ajay Karthik focused on improving the stability and correctness of the SSO authentication flow for the better-auth/better-auth repository during January 2026. He addressed a critical bug by normalizing user emails to lowercase, preventing duplicate account creation across OIDC and SAML protocols. This solution involved updating the Node and TypeScript codebase and expanding the test suite to verify that mixed-case emails are consistently handled during sign-in. By prioritizing reliability over new feature development, Ajay enhanced the robustness of the authentication process, reducing potential sign-in errors and ensuring seamless user experiences across different identity providers in a full stack environment.