During February 2025, this developer enhanced Java interoperability in the mozilla/rhino repository by implementing a new TypeInfo system that preserves richer type details, such as type variables and parameterized types, for improved reflection-based interop. Their work involved extensive refactoring across multiple Java files to integrate the updated type system, enabling more accurate and reliable cross-language reflection. Leveraging skills in Java, object-oriented design, and type systems, the developer established a stronger foundation for future Java integration features. The depth of the changes reduced risk in inter-language calls and demonstrated a thoughtful approach to evolving interoperability within a complex codebase.