Markdown as a Protocol for Generative Agentic UI

Summary

Developer Fabian Kübler describes a technique for enabling AI assistants to generate reactive user interfaces mid-conversation by leveraging markdown code fences as a protocol layer. The approach introduces a mount() UI primitive that allows an LLM to produce interactive components — forms, streaming data displays, and callback handlers — directly within a chat interface, essentially turning standard markdown output into a generative UI system. The concept treats markdown not just as a formatti