During January 2026, Felipe Valderrama focused on backend development for the better-auth/better-auth repository, delivering a targeted improvement to the OAuth authentication flow. He refactored the OAuth provider endpoints to standardize header handling by transitioning from ctx.request.headers to ctx.headers, which enhanced clarity and consistency across client-related operations. This change aimed to improve maintainability and ensure predictable integration behavior, addressing a common source of confusion in API development. Working primarily with TypeScript, Felipe applied his expertise in API and backend development to streamline the codebase. No major user-impacting bugs were reported or fixed during this period, reflecting stable implementation.