# Vercel — How our agents build on-brand pages with design.md

- Company: Vercel (vercel.com)
- Announced: 2026-08-31T04:00:00+00:00
- Category: developer-tool-release
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://vercel.com/blog/how-our-agents-build-on-brand-pages-with-design-md
- Record: https://forck.live/items/20663-how-our-agents-build-on-brand-pages-with-design-md
- Subject: v0 / AI SDK / AI Gateway

Vercel introduced design.md, a public file and accompanying stylesheet that provides guidance for AI coding agents to generate on-brand pages outside Vercel's own codebases. The system includes an evaluation loop to refine the guidance, and the stylesheet offloads design decisions from the model by providing predefined CSS classes.

## Evidence

Verbatim from https://vercel.com/blog/how-our-agents-build-on-brand-pages-with-design-md:

> We created a stylesheet because agents kept inventing their own typography, spacing, and layout, so we took those decisions away from the model entirely. The stylesheet packages our design system's primitives, such as headers, tables, stat strips, and chart styles, as CSS that any page can use via a public URL.

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Record: https://forck.live/items/20663-how-our-agents-build-on-brand-pages-with-design-md
Catalogue: https://forck.live/llms.txt
Current issue: https://forck.live/feed.md