Gu Huajun enhanced the moby/buildkit repository by improving the buildkitd.toml.md documentation, focusing on certificate trust for self-signed certificates and the implications of the 'insecure' registry option. Through a series of targeted Markdown updates, Gu clarified how registry connections are affected by configuration choices and detailed token authentication scenarios across different clients. This work emphasized clear documentation practices and configuration guidance, aiming to reduce misconfiguration risks and streamline developer onboarding for private registries. By addressing nuanced security and authentication behaviors, Gu demonstrated depth in documentation and cross-client authentication, ensuring the guidance remains current and actionable for the BuildKit community.