Worked on the ziglang/zig repository to enhance the robustness and safety of memory management in the Zig standard library. Focused on a critical bug fix involving mmap with the FIXED_NOREPLACE flag, ensuring that existing memory mappings are properly detected and errors are reported rather than causing crashes or memory corruption. Applied strong system programming skills and careful error handling to improve error propagation, reducing the risk of silent failures in low-level operations. Utilized Zig for precise memory management, demonstrating attention to code hygiene and commit clarity. The work contributed to more reliable and maintainable memory-mapped operations within the project.