During January 2026, Cumpoing79 enhanced error message handling in the curl/curl repository by refactoring the Windows error-reporting path. They replaced the use of FormatMessageW with FormatMessageA, allowing error messages to be fetched directly in the local codepage and eliminating the need for manual Unicode-to-multibyte conversions. This approach reduced encoding overhead and simplified the codebase, improving both runtime performance and maintainability for Windows builds. Working in C and leveraging the Windows API, Cumpoing79 demonstrated system programming expertise by aligning the implementation with the deprecation of Windows CE and streamlining future maintenance for Windows-specific error handling.