How To Design In The Agent Era

Video summary

Paper founder Stephen Haney demos agent-native design and explains why human taste—not AI-generated purple gradients—helps companies stand out.

Paper founder Stephen Haney tells YC’s Aaron Epstein that Paper uses HTML and CSS as its rendering engine, letting agents work directly with designs while humans edit visually. In demos, Paper generates shaders and images, turns designs into React or Tailwind code, and connects to tools such as Cursor and Conductor. Reviewing Legion Health, Sytex, and Moreta, Haney shows how to improve generic AI designs: limit typography to about three sizes, reduce bold text, fix contrast, and remove decorative clutter. He argues design remains a human-led differentiator because taste also involves product decisions, users, and organizational trade-offs. Paper’s 12-person team reviews every code line, while brand designer Agu built and shipped its animated website in about a week with agents. Haney also cites roughly 25,000 Twitter followers before launch and says Paper plans to add components, comments, and prototype feedback workflows.

Chapters

1. 0:00Great companies have great design: Haney says human-led design is a differentiator
2. 1:04What is Paper and why build it?: A 12-person team builds an HTML-and-CSS design tool
3. 3:17What makes Paper agent-native: Direct HTML and CSS access supports handoff and visual agent control
4. 5:11Demo: Shaders, image generation, and brand design: YC tickets, four-model image generation, and Paper Mono
5. 11:32Design-to-code and the new agent stack: Conductor, Cursor, and Paper share HTML and code
6. 16:48Design Review: Legion Health: Paper Snapshot and GPT 5.5 generate three redesign variations
7. 24:11How to avoid AI design slop: Use three font sizes and send edits straight to code
8. 28:26Design Review: Sytex’s construction product becomes clearer with three font sizes
9. 32:42The biggest tells of AI-generated design: Purple gradients, excess cards, and default dark mode
10. 37:39Design Review: Moreta’s Asia and Latin America QR wallet needs trust without losing energy
11. 41:11Can AI learn taste? Fable is more thoughtful, but human judgment still drives design
12. 43:56How Paper uses agents internally: Agu built its interactive website in a week
13. 46:52Building a community around Paper: 25,000 followers and a place alongside Sketch
14. 49:15Lessons from Stephen’s first startup: Radix UI, bottlenecks, and daily user conversations
15. 53:30What’s next for design and Paper: faster tools and organized prototype feedback