During May 2025, Coeur focused on improving documentation quality in the swiftlang/swift-evolution repository. They addressed a documentation bug in the Mutex proposal by correcting a typographical error, ensuring the written description accurately matched the code’s semantics. Using Markdown and leveraging their documentation skills, Coeur updated the proposal to replace the word “ends” with “begins,” clarifying the intended behavior for contributors and reviewers. This targeted change, delivered in a single, well-documented commit, enhanced clarity and reduced potential confusion during code reviews. The work demonstrated careful attention to detail and maintained high standards for documentation alignment without introducing new features.