GitHub Pages, GitHub's static-site hosting service, has evolved from a basic shell script to a sophisticated OAuth application capable of handling over a quarter million requests per minute. This transformation involved several strategic improvements over six months, including extensive testing, the use of public APIs, and a focus on user-driven changes to minimize disruption. The team emphasized enhancing user communication by providing clearer error messages and preventive health checks, optimizing the service for its primary use case, and ensuring cross-team collaboration for infrastructure upgrades. Additionally, GitHub's commitment to supporting open source projects like Jekyll, which powers GitHub Pages, underscores the business sense of contributing to open source communities. These efforts have led to exponential growth in the number of sites and successful site builds, reflecting the service's enhanced reliability and user satisfaction.