In December 2025, Cello focused on enhancing API security and documentation for the Kong/developer.konghq.com repository. He prepared the platform for Admin API TLS enforcement by documenting the deprecation of plain HTTP connections and outlining a clear migration path for users. Using Markdown and leveraging his expertise in Kubernetes and API security, Cello published detailed deprecation notices and updated security guidance to support a smooth upgrade to version 3.0.3. His work emphasized safer defaults and improved onboarding for TLS-enabled environments, contributing depth through comprehensive documentation rather than code changes, and reducing security risks without addressing critical bugs during this period.