Wes Feller enhanced the amplitude/amplitude-docs repository by delivering three features focused on improving documentation and front-end styling flexibility. He migrated CSS selectors from data attributes to class names, standardized naming with an amplitude-engagement prefix, and clarified beta status messaging for Themes, all using JavaScript, CSS, and Markdown. Wes expanded documentation to cover granular CSS selector options for engagement elements and provided practical guidance for proxying images via the mediaUrl SDK configuration. His work emphasized maintainability and reliability, addressing PR feedback to ensure actionable, accurate documentation that reduces configuration errors and supports broader adoption across diverse customer environments.