Daria Astafyeva updated the codemagic-ci-cd/codemagic-docs repository by delivering a documentation feature that replaced the term "Stellar" with "App Preview" throughout the iOS simulator and Android emulator documentation. She focused on improving clarity and ensuring branding consistency, which helps reduce confusion for developers and streamlines onboarding. Using Markdown and technical writing skills, Daria tracked the changes rigorously through a single commit linked to a specific issue, demonstrating attention to detail and process. While the work was limited in scope to terminology updates, it addressed a concrete need for clearer product messaging and more accurate support documentation within the project.