Worked on security-focused documentation improvements for the moby/buildkit and gitlabhq/gitlab-runner repositories, delivering two feature-level updates over one month. Enhanced BuildKit’s rootless mode documentation by replacing discouraged flags with recommended --security-opt usage, aligning guidance with current containerization best practices. In GitLab Runner, clarified unsupported Docker security options to reduce user confusion and misconfiguration risk. Collaborated across repositories, using Markdown to ensure clear, accurate communication of technical changes. Demonstrated skills in build systems and documentation, contributing to a more robust security posture and lowering support overhead by making deployment requirements and limitations more transparent for users and maintainers alike.