Worked on the ziglang/zig repository to implement strict undefined symbol enforcement during the build process, introducing support for the -z defs linker flag. This feature ensures that builds fail when unresolved symbols are detected, improving early error detection and preventing runtime failures caused by missing symbols. The approach involved integrating the new flag into the Zig build system, validating the changes across common build configurations, and updating documentation for clarity. Demonstrated skills in compiler design, error handling, and system programming using Zig, with a focus on enhancing build reliability and streamlining continuous integration feedback for faster issue identification and resolution.