During August 2025, Fanefanes upgraded the Matter.js Type Definitions to version 0.20.0 in the grafana/k6-DefinitelyTyped repository, focusing on enhancing API coverage and type safety for downstream TypeScript projects. The work involved adding new properties and methods to the IBody and IRenderOptions interfaces, as well as introducing new static methods on Constraint and Events. By leveraging TypeScript and a deep understanding of type definitions, Fanefanes improved compile-time checks and reliability for users of k6 typings. This targeted feature development addressed evolving API requirements and enabled safer, more robust integration for developers relying on accurate type information.