Fabian Lim focused on improving documentation quality for the volcengine/ai-app-lab repository, addressing issues that impacted developer onboarding and support. He identified and corrected outdated routing links in Markdown files, ensuring that references in the chat2cartoon and live_voice_call project READMEs accurately reflected the current application structure. Fabian also removed obsolete testing instructions, such as deprecated backend testing steps and test_full_process.py execution, to align documentation with present workflows. His work, centered on documentation and Markdown, enhanced clarity and reduced confusion for new contributors. While the scope was limited to non-runtime changes, the updates contributed to better maintainability and onboarding efficiency.