During December 2024, this developer enhanced the iTwin/appui repository by making the WidgetDef.defaultState property publicly accessible, allowing external modules to interact directly with the defaultState API. The work involved removing the internal annotation from the defaultState getter, updating TypeScript source files, and revising API documentation to reflect the new public exposure. By focusing on API design and TypeScript development, the changes improved the extensibility of the codebase and laid the foundation for broader ecosystem integration. The implementation was documented in Markdown and TypeScript, supporting external tooling and enabling future enhancements by making key state information available to consumers.