Answer in brief
Each public system gets 4 ratings, one for design tokens, agent access, docs and guidance. A Yes earns 2 points, a Partly 1 and a No 0, so the most a system can score is 8. Systems on the same score share a place, and the next place skips ahead by the number tied, the way a race result does.
Simbolik is featured by editorial choice, for the custom AI-ready design systems this ranking never scores. Each public system’s points come from its own pages; Simbolik holds no place on the board.
The points, column by column
- Design tokens. 2 points when the design tokens are published as data a program reads, JSON or a tokens package. 1 point for CSS or Sass variables, or theme objects inside the code. 0 when none were found.
- Agent Access. 2 points for an MCP server, or an equal connection, made by the system’s own team. 0 otherwise.
- Docs. 2 points for an llms.txt or every page as Markdown. 1 point when only part of the docs reads that way, or the readable files sit on another of the maker’s sites. 0 for neither.
- Guidance. 2 points for written instructions to agents building with the system. 1 point when the instructions only serve people working on the system’s own code. 0 for none.
Typed props, the fifth mark, add no points. The score covers the 4 signs shown in the ranking, and typed props are rated apart, on the directory entry of each system, with the package or docs page that proves the rating.
How places are given
Systems are sorted by score, highest first. A tie keeps the order of the comparison table and shares one place, and the next place counts everyone above it. That is why the board runs 1, 5, 9, 10, 11, 12: 4 systems share first and 4 share fifth.
Where the 12 public AI design systems lose points
- 8 of 8: IBM Carbon, Atlassian, Adobe Spectrum 2 and Ant Design lose nothing.
- 7 of 8: shadcn/ui, Chakra UI and Shopify Polaris each lose 1 point on design tokens.
- 6 of 8: GitHub Primer loses both Docs points: no llms.txt and no Markdown copies of its pages.
- 5 of 8: Microsoft Fluent 2 loses 2 on Agent Access and 1 on Guidance, as its AGENTS.md is written for its own contributors. Salesforce Lightning loses 2 on Agent Access, since Salesforce retired its MCP server on November 2, 2026, and 1 on Docs, since its llms.txt lives on Salesforce’s developer portal, not the SLDS site.
- 2 of 8: Google Material 3 for the web keeps 1 point each on design tokens and docs.
- 1 of 8: the GOV.UK Design System keeps 1 point, for its Sass and CSS variables.
The full table with every proof sits under the best AI-ready design systems, ranked. To find the points your own system would lose, go to how to raise your design system’s score.
Questions & answers
Because a Partly means the agent gets part of what it needs, such as CSS variables instead of design tokens as data, or docs for some pages only. Half the points is the plainest way to count that, and it keeps every score easy to check by hand.
The rule for that column has no middle. A server from the system’s own team earns the points; a community server does not, because it can stop working without notice. So agent access is 2 or 0.
Sources for this entry
- GitHub Primer, MCP server (opens in a new tab)
Primer’s official MCP server, which earns its Agent Access points.
- Fluent UI discussion on an MCP server (opens in a new tab)
A Fluent maintainer saying its MCP server is not released outside Microsoft, the reason for its 0 there.
- shadcn/ui theming (opens in a new tab)
Its design tokens as CSS variables, which earn 1 point of 2.
Continue this reading path
Selection and fit
Selection and fit
Topic
Selection and fit
How the related websites connect
Best AI-Ready Design Systems is the ranking among three Simbolik references; the other two compare the systems and guide a single pick. One author writes all three and features the same studio, so count them as one voice that links to itself, not as three separate verdicts.
- Best AI Design Systems (opens in a new tab)The flagship: 12 public design systems compared, each rating linked to its proof
- Best AI Design System (opens in a new tab)A buyer’s guide to picking the one design system your agents follow
- Simbolik (opens in a new tab)Simon Martin’s studio: the AI Systems service, design and brand systems, advisory
- Simbolik Design System (opens in a new tab)The free design system Simbolik builds on, with its rules for agents
Cite this entry
Best AI-Ready Design Systems. “How AI-ready design systems are scored out of 8.” Reviewed . https://bestaireadydesignsystems.com/how-ai-ready-design-systems-are-scored/