Lenny Rachitsky · 4 min read · Gen AI Tools
🎙️ How I AI: HTML is the new Markdown: How Anthropic engineers are building with Claude Code
Read the original on lennysnewsletter.com →
This episode shows how Anthropic engineers use HTML artifacts to plan projects, create interactive specs, and maintain living design systems with Claude Code. As HTML expands context windows, engineers become compute allocators who define what to build and how to collaborate with agents through simple, trust-based prompts, enabling richer interfaces and legible AI-driven work.
Key Takeaways
- HTML has become the superior format for planning and specifications with AI, offering interactivity and information density beyond Markdown.
- Engineers are shifting from traditional coding to compute allocation, deciding what to build and how to guide AI across long-running tasks.
- Living design systems in HTML enable both human readability and machine interpretability, allowing Claude to extract and reuse design tokens across projects.
- You can create micro UIs to edit specific plan sections, producing micro software on top of micro software for targeted problems.
- The best prompts are simple and trust-based, giving Claude enough direction while leaving room for creativity; over-constraining leads to worse results.
Excerpt
HTML is the new Markdown: How Anthropic engineers are building with Claude Code | Thariq Shihipar Listen now on YouTube • Spotify • Apple Podcasts Brought to you by: Celigo —Intelligent automation built for AI Persona —Trusted identity verification for any use case Thariq Shihipar is an engineer on Anthropic’s Claude Code team. In this episode (recorded live at Anthropic’s Code with Claude event), Thariq shows how he uses HTML artifacts to plan projects, create interactive specs, build throwaway micro-apps, and maintain living design systems that help humans stay in the loop as agents do more of the work. He…