During January 2025, Sinskiy focused on backend and full stack development for the withastro/astro repository, addressing a nuanced SEO issue affecting server islands. Sinskiy engineered a targeted bug fix using JavaScript and TypeScript, introducing an X-Robots-Tag: noindex header to server island responses. This approach prevented search engines from indexing internal components as standalone pages, thereby preserving the intended structure and quality of search results. The solution was carefully scoped to HTTP headers, ensuring no impact on rendering or performance. Sinskiy also documented the methodology, supporting future header-based controls and quality assurance for sustainable indexing management and testing practices.