https://video.ut0pia.org/videos/watch/021f3289-2181-4e2f-9cbe-eb7875962ebc Ruben Casas from Postman prompted a model to rewrite his blog. It built a search box with a blur animation and accessibility out of the box, without being asked. That was when he concluded the model writes better frontend code than he does. His question for the talk: if the models are this capable, why are most agent UIs still invoking static prebuilt components? The talk maps three points on the spectrum. Static components pass props to predefined React elements (AG UI, Goose auto visualizer). Declarative UI has the LLM generate JSON or YAML that a rendering engine maps to components at runtime. Ruben argues this is the right balance today. Fully generative UI skips components entirely: the model writes HTML, CSS, and JavaScript on demand. His weather agent does this in a single tool call. The catch is containment: LLM generated code needs a sandbox, which is why MCP apps and their double iframe default matter. He closes on the TV analogy. The first TV shows were radio shows with cameras because nobody could imagine what else to do with the new medium. We are in that era. Speaker info: https://x.com/Infoxicador, https://www.linkedin.com/in/ruben-casas-17100383/ Thu, 04 Jun 2026 07:47:15 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://video.ut0pia.org https://video.ut0pia.org/lazy-static/avatars/0287a09a-aae7-4840-9843-b416426e7046.webp https://video.ut0pia.org/videos/watch/021f3289-2181-4e2f-9cbe-eb7875962ebc All rights reserved, unless otherwise specified in the terms specified at https://video.ut0pia.org/about and potential licenses granted by each content's rightholder.