Worked on the OI-wiki/OI-wiki repository to enhance documentation for the SelfEval tool, focusing on improving clarity and formatting within the main oi.md file. Applied technical writing and documentation skills using Markdown to deliver a more accessible usage description, which streamlined comprehension for OI contest participants. Addressed formatting inconsistencies to ensure reliable rendering across different platforms, reducing the need for post-publication edits. This update aimed to lower support overhead and facilitate broader adoption of the SelfEval tool within the community. The work demonstrated attention to detail and a methodical approach to documentation, emphasizing usability and maintainability over a one-month period.