Vitali Kolodribskyi updated the pantheon-systems/documentation repository to set Next.js 16 as the default framework for new site creation on Pantheon, focusing on improving onboarding documentation. He revised and expanded the documentation to include explicit guidance and command usage for Next.js 16, ensuring developers have clear, actionable instructions. Using Markdown and leveraging his skills in Next.js, React, and technical writing, Vitali aligned the documentation structure with current platform capabilities. This work addressed developer pain points by clarifying site creation defaults, reducing support queries, and enabling faster adoption of new features, demonstrating a practical and thorough approach to versioned documentation workflows.