HTML is the new Markdown: How Anthropic engineers are building with Claude Code | Thariq Shihipar

📰 Lenny's Newsletter

Learn how Anthropic engineers are using HTML to build with Claude Code, replacing markdown, and creating micro-apps for spec editing and living design systems

intermediate Published 18 May 2026

Action Steps

Watch the video on Claude Code to understand the shift from markdown to HTML
Explore how to build micro-apps for spec editing using HTML and Claude Code
Apply the concept of living design systems to your own projects
Investigate how to become a 'compute allocator' and optimize resource allocation
Configure your development environment to use HTML for building with Claude Code

Who Needs to Know This

Engineers and designers on a team can benefit from understanding how Anthropic is using HTML to build with Claude Code, and how this approach can be applied to their own projects, improving collaboration and efficiency

Key Insight

💡 HTML is being used as a replacement for markdown in building with Claude Code, enabling more efficient and collaborative development