During May 2025, Veikka contributed to the ziglang/zig repository by addressing a critical issue in macro processing. Focusing on the buildArgsHash function, Veikka implemented a bug fix that improved the validation of macro identifiers, thereby enhancing the robustness of macro expansion across different configurations. This work required a solid understanding of Zig programming, compiler design, and error handling, as the solution involved correcting an assertion to ensure reliable macro processing. Although the contribution was limited to a single bug fix, the depth of the change demonstrated careful attention to compiler internals and contributed to the overall stability of the codebase.