Timothy updated the smarty/changelog repository to document the migration from HttpWebRequest to HttpClient in preparation for the 10.0.0 release. He focused on changelog management and documentation, using Markdown to clearly explain the shift to asynchronous-by-default client calls and the availability of blocking options. His work provided explicit migration guidance, detailing the rationale behind the change and its impact on performance and scalability for SDK users. By aligning the documentation with modern .NET practices, Timothy aimed to reduce migration friction and improve the developer experience. The work was limited in scope but addressed a critical transition for downstream users.