Sergey focused on enhancing documentation within the getlago/lago-doc repository by integrating an OpenAPI Reference directly into the README. Using Markdown and technical writing skills, Sergey created a clear entry point for users to locate API specifications, streamlining the onboarding process and supporting faster API integrations. This update established a single, authoritative source for API references, reducing confusion and laying the foundation for scalable documentation practices. Although no bugs were addressed during this period, the work demonstrated a methodical approach to improving documentation clarity and consistency, leveraging documentation best practices and Markdown to align with API-first development workflows for future updates.