Manh Phuc contributed to the WordPress/gutenberg and Automattic/gutenberg repositories by delivering targeted documentation and UI improvements over a two-month period. He enhanced navigation and readability in Gutenberg documentation, aligning UI elements and correcting broken links to streamline onboarding and improve contributor experience. Using PHP, CSS, and HTML, he addressed accessibility and security by refining server-side rendering and sanitizing content in the Footnotes block. Manh Phuc also updated contributor guides and removed private links to strengthen privacy. His work demonstrated cross-repository collaboration, technical writing, and repository management, resulting in more accurate, accessible, and secure documentation for open source contributors.