Designing and implementing the official Rust package manager, Cargo

Designing and implementing the Clippy linter

Regular contributors to the Clippy linter

Managing operations, development, and official policies for crates.io

Docs.rs, the documentation hosting service for crates

Developing and managing the Rustdoc documentation tool

Rustdoc frontend design, UI, UX and development

Designing and implementing rustfmt, a formatting tool for Rust code

Designing and implementing rustup

Working on the associated libraries, tooling, strategy, and integration points that support the developer experience with writing, executing, and analyzing tests