During December 2024, Nikita Vitkov worked on foundational schema development for the w3c/webdriver-bidi repository, focusing on future-proofing the WebDriver BiDi protocol. Nikita designed and integrated a WebExtension module into the global CDDL schema, establishing a formal extension point for browser extensions. The work centered on protocol design and schema definition, introducing new command and result types to support future WebExtensions interactions. By delivering minimal, schema-only changes, Nikita minimized implementation risk while enabling future development. The approach demonstrated depth in CDDL and protocol design, laying essential groundwork for subsequent feature expansion without introducing immediate complexity or instability to the codebase.