Brad Cowie enhanced the astral-sh/uv repository by developing an exclusion-aware upgrade flow for the UV tool, addressing a nuanced challenge in package management. Using Rust and leveraging skills in dependency resolution, Brad ensured that dependencies explicitly excluded during installation are now persistently tracked and respected during upgrades. This involved persisting exclusion data in the tool’s receipt and integrating it with the requirements resolver, followed by comprehensive end-to-end validation. The solution reduces upgrade churn and prevents surprise reinstalls, giving users greater control and predictability. Brad’s work demonstrates a thoughtful approach to reliability and user experience in Rust-based package management tooling.