Worked on the canonical/checkbox repository to enhance developer experience and test reliability. Updated the CONTRIBUTING.md documentation using Markdown to require pkg-config and libsystemd-dev, addressing common build and installation issues for new contributors. Improved test automation by skipping the cpu/clocktest on the s390x architecture, mitigating failures related to sched_setaffinity and increasing CI stability across platforms. Demonstrated skills in bug fixing, documentation, and cross-architecture test strategy, with careful attention to commit hygiene and traceability. The work focused on infrastructure and documentation governance, resulting in smoother onboarding and more consistent test outcomes, aligning with broader product reliability objectives.