HTML replaces Markdown as the go-to format for AI agent collaboration

The Gist

• Anthropic engineers use HTML for interactive specs and micro-apps with Claude Code
• HTML offers richer expression and better information density than Markdown
• Engineers now focus on compute allocation rather than code writing
• Throwaway UIs enable precise editing of AI-generated plans

• HTML has replaced Markdown as the superior format for communicating with AI agents due to its richer expression, interactive elements, and better information density.
• Engineers are transitioning from code writers to 'compute allocators,' focusing on deciding what’s worth building and staying in sync with AI agents.
• Custom, throwaway UIs built with AI can make editing specific parts of plans more enjoyable and efficient.
• Living design systems in HTML are more effective than traditional design tools like Figma or GitHub repos.
• Only about 1% of AI-generated tokens go into production code, with the majority used for dashboards, custom interfaces, and tools for understanding what to build.
• Being kind to AI models like Claude likely produces better outputs and fosters a healthier interaction pattern.

• Adopt HTML over Markdown for AI agent collaboration to leverage richer, interactive, and more readable formats.
• Focus on becoming a 'compute allocator' by prioritizing decision-making and planning over traditional coding tasks.
• Experiment with creating custom, throwaway UIs for specific tasks to improve engagement and efficiency.
• Maintain living design systems in HTML to ensure consistency and ease of use across projects.

• 1% (Percentage of AI-generated tokens that go into production code.)