Worked on evolving Rust trait hierarchies by designing and proposing the introduction of supertraits within the rust-lang/rust-project-goals repository. The approach involved restructuring existing traits to enhance flexibility, composability, and clarity in trait-based abstractions, directly addressing the needs of downstream crate authors. Leveraging skills in Rust, software design, and project management, the work produced a detailed, reviewable roadmap that aligns with Rust’s broader design goals. The proposal was documented in Markdown and prepared for stakeholder review, outlining expected benefits such as reduced boilerplate and improved trait relationships, thereby supporting more expressive and maintainable API development across the Rust ecosystem.