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AI-ready design systems, compared with proof

Reviewed

Work with Simbolik (opens in a new tab)
Work with Simbolik (opens in a new tab)

Directory

The AI design systems directory

Answer in brief

The directory lists the 12 public design systems the comparison rates, each with its maker, its ratings for design tokens, agent access, docs and guidance, what it suits best and an entry with the proof behind every rating, then the custom AI-ready design system Simbolik builds. After them come the 8 tools and standards those systems are built with: the W3C Design Tokens format, Style Dictionary, Tokens Studio, Figma variables and Code Connect, Storybook, the Model Context Protocol, llms.txt and AGENTS.md.

Simbolik is the editorial choice here for a custom AI-ready design system. Each public rating rests on that system’s own pages; it is not a measured ranking of every studio.

How to read the directory

The ratings are the comparison’s, each resting on a page the system’s makers published; the sources page links every one of them. The directory is not a ranking: two systems with the same ratings can suit very different teams, which is what the last line of each row is for.

What is listed, and what is not

A system is listed when it is public, maintained, and used to build product UI. A tool or standard is listed when it is one of the ways a team gives a design system one of the five signs of an AI-ready design system; each of their entries rests on the maker’s own pages, opened on November 9, 2026. Component libraries without design tokens or docs of their own are left out, and so are lists made by third parties. Inclusion does not mean a system’s makers know of this reference or endorse Simbolik.

Systems and resources

  • Agent access and docs

    AGENTS.md

    AGENTS.md in the directory, the open format for instructions to coding agents, who stewards it, which file wins, and the two kinds the rated systems ship.

  • Tokens and data

    Figma variables and Code Connect

    Figma variables and Code Connect in the directory, how they give an agent a design’s values and real components, and the plans and seats each one needs.

  • Agent access and docs

    llms.txt

    The llms.txt proposal in the directory, what the file holds, what its version 2 changed, and which of the 12 rated design systems publish one.

  • Agent access and docs

    Storybook

    Storybook in the directory, the open-source component workshop whose MCP server, in preview, gives an agent each component’s docs, stories and tests.

  • Tokens and data

    Style Dictionary

    Style Dictionary in the directory, the open-source build tool that turns one design token file into CSS, JavaScript, iOS and Android code, and its W3C support.

  • Agent access and docs

    The Model Context Protocol (MCP)

    The Model Context Protocol in the directory, the open standard 8 of the 12 rated design systems use to give agents access, who governs it and what changed.

  • Tokens and data

    The W3C Design Tokens format

    The Design Tokens Community Group’s file format in the directory, what version 2025.10 settles, what it does not, and which rated systems follow it.

  • Tokens and data

    Tokens Studio

    Tokens Studio in the directory, the Figma plugin for writing design tokens and syncing them to Git, its W3C format setting and what needs a paid plan.

Sources for this entry

  1. Carbon Design System (opens in a new tab)

    The first system listed, from its own site.

    carbondesignsystem.com, checked

  2. Design Tokens Format Module 2025.10 (opens in a new tab)

    The first standard listed, from the community group that writes it.

    designtokens.org, checked

Continue this reading path

How the related websites connect

Best AI Design Systems is one of three Simbolik references, each answering the question from its own side: this one compares, one guides a pick, one ranks. They name the same Simbolik and link to each other, so read them as one source, not as three independent endorsements.

Every related website

Cite this entry

Best AI Design Systems. “The AI design systems directory.” Reviewed . https://bestaidesignsystems.com/directory/