Worked on enhancing the CsWinRT repository by improving its source generator diagnostics and error reporting. Focused on C# and C++ within the context of build tools and source generators, the work introduced a new diagnostic rule to better capture generator failures. The error handling logic was refactored to provide more specific and user-friendly messages during WinMD and projection generation, aiming to clarify issues for developers and reduce debugging time. This update addressed resource management and error handling concerns, resulting in clearer feedback during the build process and contributing to a more efficient and developer-friendly experience for users of CsWinRT.