During July 2025, this developer contributed to the OI-wiki/OI-wiki repository by enhancing its documentation, specifically adding a new exercise to the frac-programming.md file. The work focused on improving clarity and consistency, with careful attribution to the original author and adherence to repository standards. Utilizing Markdown for content creation and remark-lint for formatting, the developer ensured the documentation met quality guidelines and was easy to maintain. Conventional commit practices and PR-style workflows were followed throughout. While the scope was limited to a single feature and no bugs were addressed, the contribution supported future maintainability and improved the documentation’s readability.