Worked on the babel/website repository to enhance documentation for the @babel/parser, focusing on the new startIndex option and its interaction with startLine values greater than one. The update clarified how source index management should be handled, providing practical guidance for developers integrating the parser into projects that require precise control over parsing indices. This documentation improvement, written in Markdown, aimed to reduce integration risks and make parser configuration more intuitive for downstream users. The work emphasized clear communication and usability, leveraging strong documentation skills to address a specific need without introducing new features or bug fixes during the period.