During March 2026, Sylph01 focused on enhancing type safety and API reliability in the sorbet/sorbet repository by addressing a critical bug in the Ruby RBI static analysis tooling. They implemented a fix ensuring that module attribute accessor methods—attr_accessor, attr_reader, and attr_writer—now consistently return arrays of symbols rather than NilClass, aligning with expected RBI contracts and reducing downstream errors for developers and tooling. This work involved careful Ruby development, static analysis, and validation through CI tests and code review. Sylph01’s contribution improved the developer experience for Sorbet users by clarifying return types and strengthening type safety in the codebase.