Codebase Formatting and Standardization

This feature thread tracks Stripe's initiatives to maintain code quality and developer productivity across its massive codebase. It began with the introduction of rubyfmt, a Rust-based autoformatter, which was rolled out across the entire 25 million line Ruby codebase to ensure consistent formatting overnight. This effort highlights Stripe's commitment to large-scale code standardization and developer tooling. This post details the specific story and technical considerations behind the successful overnight rollout of rubyfmt across the entire codebase, including strategies for managing the scale and ensuring minimal disruption.