During September 2025, Dragan Mijic focused on improving the zio/zio repository by addressing a documentation bug related to running tagged tests via the command line. He identified that the existing example omitted the required -- separator before test tags, which led to confusion and incorrect test execution, particularly for slow tests. By updating the Markdown documentation, Dragan clarified the correct CLI syntax, drawing on his expertise in documentation practices and command-line semantics. This targeted fix enhanced the reliability of test runs and streamlined onboarding for new contributors, demonstrating careful attention to detail and a practical approach to open-source collaboration and knowledge sharing.