Developed a comprehensive HTML Learning Guide for the seclabBupt/aiacc repository, focusing on web development fundamentals and effective onboarding for new contributors. The guide detailed essential HTML concepts, including basic structure, common tags, forms, semantic HTML, and HTML5 features, and incorporated curated learning resources and practical suggestions to support developer education. Emphasizing documentation best practices, the work established a reusable, version-controlled reference that accelerates ramp-up for aspiring web developers. The technical approach centered on clear content organization and semantic markup, leveraging HTML5 and documentation skills to create a maintainable educational asset. No major bugs were reported during this development period.