Worked on the vitest-dev/vitest repository to improve the accuracy and clarity of project documentation, focusing on the inclusion and exclusion of test files for parallel and sequential testing modes. Addressed a documentation bug by correcting terminology and updating guidance to reflect actual system behavior, thereby reducing confusion for new contributors and supporting smoother onboarding. Utilized Markdown for technical writing, ensuring that the documentation aligned with both release notes and commit history for traceability. The work emphasized clear communication and precise documentation practices, contributing to a more accessible developer experience without introducing new features or changes to the codebase itself.