Roman Mashevskyi contributed to the fastapi/fastapi repository by standardizing Ukrainian documentation for LLM prompts. He focused on improving translation consistency, clarity, and terminology coverage, enabling Ukrainian-speaking developers to use LLM prompts more reliably. Roman applied technical writing and localization skills, working primarily in Markdown to enhance the accuracy and usability of the documentation. His targeted updates addressed gaps in terminology and ensured that translated content matched the technical intent of the original English documentation. While the work was limited to one feature over a month, it demonstrated careful attention to detail and improved the overall quality of Ukrainian-language resources.