During their work on the xmake-io/xmake-repo project, Nils Daumann focused on improving the reliability of the Protobuf-Cpp test harness by addressing a bug that caused CI failures when required tools were missing. Nils enhanced the on_test process to verify tool availability before execution, which reduced flaky tests and improved build stability. This Lua-based solution streamlined troubleshooting and provided more predictable test outcomes, benefiting both developer onboarding and feedback cycles. By leveraging skills in Lua scripting, build systems, and package management, Nils delivered a targeted fix that deepened the project’s resilience in environments where dependencies might be absent.