Answer in brief
Every point on the board traces to a public page: a system’s own docs, its official GitHub, its npm page, its makers’ blog, or the standard a column asks for. This page lists each source once, with what it supports and the entries that cite it, followed by the 48 ratings that make up the 12 scores.
What may count as proof
Only a page published by a system’s makers, or by the group that wrote a standard, can earn a system points. Rankings and lists on other sites never count, since they cannot show what a package actually ships. When no public page shows a thing, the rating is No, and the score drops by 2.
What a source does not say
A source proves what its own system offers. It does not recommend Simbolik or this Site, and its makers may not know either exists. To see the points in order, go back to the best AI-ready design systems, ranked.
Every source the entries cite
- Model Context Protocol, server concepts (opens in a new tab)
The 3 things an MCP server offers, tools, resources and prompts, and the JSON Schema that types a tool’s inputs.
- GitHub Primer, MCP server (opens in a new tab)
Primer’s official local server, with tools for components, design tokens, coding guidelines and CSS linting.
- Ant Design, MCP server (opens in a new tab)
Ant Design’s official server, started with antd mcp from its own CLI.
- shadcn/ui, MCP server (opens in a new tab)
An official server that browses, searches and installs components from registries.
- Shopify Dev MCP (opens in a new tab)
Shopify’s server, which also validates UI extension code, and covers all of Shopify rather than Polaris alone.
- Atlassian Design System, get started with AI (opens in a new tab)
Atlassian’s server, offered both hosted and as an npm package.
- Fluent UI discussion on an MCP server (opens in a new tab)
A Fluent maintainer saying its MCP server is not released outside Microsoft.
- govuk-frontend-mcp on GitHub (opens in a new tab)
A community server for GOV.UK Frontend that describes itself as unofficial.
- Design Tokens Format Module 2025.10 (opens in a new tab)
The format’s $value, $type, $description and $deprecated properties, its aliases, its types, the .tokens.json extension and its status as a community report.
- IBM Carbon, white theme tokens (opens in a new tab)
A public theme file that points at the 2025.10 schema and describes itself in $description.
- GitHub Primer, primitives (opens in a new tab)
Primer’s design tokens, published as JSON and following the W3C format according to its own guide.
- @adobe/spectrum-tokens on the npm registry (opens in a new tab)
Adobe Spectrum’s design tokens as a published JSON package.
- @atlaskit/tokens package files (opens in a new tab)
Atlassian’s design tokens as JSON files in a format of its own.
- shadcn/ui theming (opens in a new tab)
Design tokens kept as CSS variables, the form that earns 1 point of 2.
- Style Dictionary (opens in a new tab)
A tool that builds CSS and other platform files from design tokens in the community group’s format.
- Material Web on GitHub (opens in a new tab)
A public system whose own repository says it is in maintenance mode, the kind of fact to find before you pick one.
- AI Systems, Simbolik (opens in a new tab)
The custom route, where the AI-ready system is built around one company’s look and rules.
- Carbon MCP, onboarding and setup (opens in a new tab)
Carbon’s official MCP server and its instructions for agents, both from IBM itself.
- GOV.UK Design System, /llms.txt (missing) (opens in a new tab)
Proof of a gap: the address answered 404 when checked, so this system has no llms.txt.
- The /llms.txt file (opens in a new tab)
The llms.txt proposal, its only required part (an H1 with the name), its summary, its sections of links, its Optional section and the .md copy of each page.
- Atlassian Design System, llms.txt (opens in a new tab)
An llms.txt beside a full-text file and split files for design tokens, components and primitives.
- Atlassian Design System, llms-full.txt (opens in a new tab)
Atlassian’s whole docs as one text file, about 670 KB.
- React Spectrum, Button as Markdown (opens in a new tab)
A docs page served as Markdown by adding .md to its address.
- Shopify Polaris docs as Markdown (opens in a new tab)
Every shopify.dev page available as Markdown, though the site has no llms.txt.
- Microsoft Fluent 2, llms.txt (opens in a new tab)
Fluent’s llms.txt, with a plain-text file for each docs page.
- GitHub Primer, /llms.txt (missing) (opens in a new tab)
Proof of a gap: the address answered 404 when checked, and Primer’s pages have no Markdown copies.
- Licenses, Simbolik Design System (opens in a new tab)
A design system with separate licenses for its code (MIT), its Figma file (CC BY 4.0), its fonts (SIL OFL 1.1) and its icons (MIT), and a name and logo kept out of all of them.
- The MIT License, Open Source Initiative (opens in a new tab)
The MIT condition that its notice is included in all copies or substantial portions of the software.
- Apache License 2.0 (opens in a new tab)
Apache’s conditions to pass on the license, mark changed files and keep any NOTICE file’s attributions.
- SIL Open Font License (opens in a new tab)
What the OFL allows for fonts in websites and apps, and the Reserved Font Names a modified font may have to drop.
- IBM Plex license (opens in a new tab)
IBM Plex under the SIL OFL 1.1 with the Reserved Font Name “Plex”, and the rule that the font may not be sold by itself.
- @carbon/icons on the npm registry (opens in a new tab)
IBM Carbon’s icons published under Apache-2.0.
- Carbon typography overview (opens in a new tab)
IBM Plex as the typeface of the Carbon Design System.
- GOV.UK Design System, typeface (opens in a new tab)
The GDS Transport font for services on service.gov.uk, another typeface for services elsewhere, and the site’s content under OGL v3.0.
- @salesforce-ux/design-tokens on the npm registry (opens in a new tab)
Salesforce’s design tokens package pointing to a license file of its own rather than a standard license.
- @shopify/polaris on the npm registry (opens in a new tab)
The Polaris React package pointing to a license file of its own, and marked deprecated.
- Material Design icons license (opens in a new tab)
Google’s Material icons under the Apache License 2.0.
- Simbolik home page (opens in a new tab)
The 3 services, the side-by-side test of 2 agents on one brief, and the usual time to a first build.
- AMPECO case, Simbolik (opens in a new tab)
The design system and AI design engine built at AMPECO, with the 5× figure the studio reports.
- About Simon Martin, Simbolik (opens in a new tab)
Simon Martin’s own account of his path and the studio.
- Working with AI assistants, Simbolik Design System (opens in a new tab)
The free design system’s llms.txt, Markdown copies, component catalog and checker report for agents.
- AGENTS.md (opens in a new tab)
The open format for written instructions to coding agents.
- The Salesforce DX MCP server’s end-of-life notice (opens in a new tab)
The retirement of Salesforce’s general MCP server, and the SLDS tools in it, on November 2, 2026.
- Chakra UI, MCP server (opens in a new tab)
Chakra’s official MCP server, whose tools for its paid templates need a key.
- Claude Code, memory and project instructions (opens in a new tab)
Claude Code reading CLAUDE.md at the start of every session, and reading AGENTS.md when a repository has no CLAUDE.md.
- Cursor, rules (opens in a new tab)
Cursor’s project rules as .mdc files in .cursor/rules, placed at the start of the model’s context, with AGENTS.md as an alternative.
- Ant Design, for agents (opens in a new tab)
A docs page for agents building with Ant Design, with a ready-made prompt and an installable skill.
- shadcn/ui, skills (opens in a new tab)
shadcn/ui’s official skill, installed with one command.
- GitHub Primer, design tokens guide (opens in a new tab)
A guide written for language models and shipped in Primer’s package, with rules such as never using raw values.
- Fluent UI’s AGENTS.md (opens in a new tab)
Guidance written for people contributing to Fluent itself, which earns 1 Guidance point, not 2.
- SLDS starter kit for Lightning Web Components (opens in a new tab)
An official starter kit whose AGENTS.md is aimed at building UI with SLDS.
- Model Context Protocol (opens in a new tab)
The open standard for connecting AI applications to outside systems, which all 8 official servers on the board use.
- axe-core on GitHub (opens in a new tab)
An accessibility checker whose makers say it finds about 57% of WCAG issues automatically, which is why acceptance also needs a person.
- Check your site, Simbolik Design System (opens in a new tab)
A design system checker that lists every value written by hand where a design token belongs.
- Primer MCP issue 8561 (opens in a new tab)
A bug in 2 tools of Primer’s MCP server that returned the home page for components with multi-word names, closed in October 2026.
- Define success criteria and build evaluations, Anthropic (opens in a new tab)
Specific, measurable success criteria, test cases that mirror real tasks and edge cases, and grading from exact checks to model-based grading.
- Stylelint, color-no-hex (opens in a new tab)
A lint rule that flags hex colors written in CSS.
- Playwright, visual comparisons (opens in a new tab)
Screenshots compared with a saved reference on every run.
- Web Content Accessibility Guidelines 2.2 (opens in a new tab)
The accessibility standard the automated and manual checks measure against.
- @adobe/spectrum-tokens on npm (opens in a new tab)
The Design tokens rating, a published JSON token package.
- React Spectrum, Working with AI (opens in a new tab)
The Agent access and Guidance ratings, @react-spectrum/mcp and the Agent Skills.
- React Spectrum’s llms.txt (opens in a new tab)
The Docs rating, the index beside a Markdown copy of every page.
- Ant Design’s design.md (opens in a new tab)
The Design tokens rating, design tokens as YAML in the file and JSON from the CLI.
- Ant Design’s llms.txt (opens in a new tab)
The Docs rating, the plain-text index of its docs, beside llms-full.txt.
- antd on npm (opens in a new tab)
The typed props, the package’s MIT license and its TypeScript types.
- Ant Design CLI (opens in a new tab)
The antd token and antd info commands that print design tokens and props, and the metadata that ships inside the package for offline use.
- Atlassian’s llms-components.txt (opens in a new tab)
The typed props, a table of each component’s props with their types.
- Atlassian’s llms-tokens.txt (opens in a new tab)
Its design tokens listed for agents, with the instruction to use only the ones it names.
- Material Web, theming (opens in a new tab)
System tokens that hold a design system’s decisions and roles, from color and type to shape.
- Material Web, color (opens in a new tab)
A color scheme of key color tones assigned to roles that map to components.
- Simbolik Design System, color (opens in a new tab)
Colors named by role, with the raw values beneath them never reaching a component.
- Chakra UI, theming for language models (opens in a new tab)
The Design tokens rating, design tokens and semantic tokens defined as theme objects in the package.
- Chakra UI’s llms.txt (opens in a new tab)
The Docs rating, the index beside llms-full.txt and the topic files.
- Chakra UI, skills (opens in a new tab)
The Guidance rating, the builder, migrate and refactor skills.
- @chakra-ui/react on npm (opens in a new tab)
The typed props, through the types the package ships, and its MIT license.
- Material Web, button docs (opens in a new tab)
A web component’s API section, listing its properties.
- GOV.UK button, Nunjucks options (opens in a new tab)
A component API written as a table of macro options, with no code types.
- Atlassian, ensure-design-token-usage (opens in a new tab)
A lint rule that treats hard-coded values and legacy colors as violations.
- SLDS Linter on GitHub (opens in a new tab)
Salesforce’s linter that checks code against SLDS 2 and fixes errors in bulk.
- Figma, modes for variables (opens in a new tab)
Importing and exporting variables as JSON in the community group’s format, the types it maps and its alias extension.
- Figma, guide to variables (opens in a new tab)
What variables are, their collections and modes, and their use for design tokens.
- Figma, Code Connect (opens in a new tab)
What Code Connect does, its CLI and UI, its frameworks, its plans and its use by the MCP server.
- Figma MCP server (opens in a new tab)
Figma’s remote and desktop servers, and the variables and components they give an agent.
- @primer/primitives on npm (opens in a new tab)
The Design tokens rating, design tokens shipped as JSON with CSS variables.
- @primer/react on npm (opens in a new tab)
The typed props, through the type declarations the package ships.
- Primer Brand, MCP server (opens in a new tab)
The separate server for Primer Brand, @primer/brand-mcp.
- Material Web’s docs folder (opens in a new tab)
The Docs rating, component docs in Markdown on GitHub.
- govuk-frontend in the npm registry (opens in a new tab)
The Design tokens rating, values published as Sass settings and CSS, with no design token JSON.
- govuk-frontend on GitHub (opens in a new tab)
The Guidance rating, a repository with no AGENTS.md, rules file or section for agents.
- GOV.UK Design System (opens in a new tab)
The guidance for people, and no section for AI agents.
- Carbon’s llms.txt (opens in a new tab)
The Docs rating, an index of Carbon’s pages for language models.
- @carbon/react on npm (opens in a new tab)
The typed props, through the type declarations the package ships, and its Apache-2.0 license.
- Carbon MCP on GitHub (opens in a new tab)
The server’s home in IBM’s own GitHub organization and its hosted address.
- MCP specification, 2026-07-28 (opens in a new tab)
What a server offers, tools, resources and prompts, and the roles of hosts, clients and servers.
- @fluentui/react-theme on npm (opens in a new tab)
The Design tokens rating, a published package of typed design tokens.
- @fluentui/react-components on npm (opens in a new tab)
The typed props, through the type declarations the package ships, and its MIT license.
- Plausible Analytics, data policy (opens in a new tab)
What Plausible records, and that IP addresses are never stored.
- @salesforce-ux/design-tokens 4.1.0, its files (opens in a new tab)
The Design tokens rating, raw and flat JSON alongside CSS, Swift and Kotlin.
- The SLDS tools page of the Salesforce DX MCP docs (opens in a new tab)
What is left of the SLDS tools, one beta tool its page calls superseded by a skill.
- Salesforce’s llms-lwc.txt (opens in a new tab)
The Docs rating, an llms.txt on the developer portal that lists the SLDS pages as Markdown.
- AI Development Skills, on the SLDS site (opens in a new tab)
The Guidance rating, the SLDS site’s own page on its skills to apply, validate and migrate.
- Salesforce’s llms-lightning-base-components.txt (opens in a new tab)
The typed props rating, the base components’ documented attributes, methods and events.
- Salesforce DX MCP server on GitHub (opens in a new tab)
The server’s home in Salesforce’s own organization, with its end-of-life notice at the top.
- shadcn/ui’s llms.txt (opens in a new tab)
The Docs rating, the index beside a Markdown copy of every page.
- shadcn/ui, Button as Markdown (opens in a new tab)
The typed props, a component in TypeScript with an API reference of its props.
- @shopify/polaris-tokens on npm (opens in a new tab)
The Design tokens rating, a token package that belongs to the deprecated React library.
- Shopify AI Toolkit (opens in a new tab)
The Guidance rating, the shopify skill and its Polaris topics.
- @shopify/polaris-types on npm (opens in a new tab)
The typed props, the type declarations for the Polaris web components.
- Storybook, MCP server (opens in a new tab)
The addon, its install command, its 3 toolsets, the frameworks its docs tools support and its preview status.
- Storybook, manifests (opens in a new tab)
The components manifest, made from the stories and the components’ prop types.
- storybook in the npm registry (opens in a new tab)
The current version, 10.6.6, and its MIT license.
- Style Dictionary, DTCG support (opens in a new tab)
Support for the format since version 4, the work on 2025.10 in version 5, and the converter.
- style-dictionary in the npm registry (opens in a new tab)
The current version, 5.8.0, and its Apache-2.0 license.
- Style Dictionary on GitHub (opens in a new tab)
The tool’s source and its home on GitHub.
- What is the Model Context Protocol (opens in a new tab)
What MCP is, the USB-C comparison and the applications that support it.
- MCP governance and stewardship (opens in a new tab)
The project as a series of LF Projects, and its Apache-2.0 license for code and specification.
- Introducing the Model Context Protocol (opens in a new tab)
Anthropic’s release of MCP as open source on November 25, 2024.
- Design Tokens Community Group (opens in a new tab)
The group, its first stable version and the tools and companies it lists as adopters.
- Design Tokens technical reports (opens in a new tab)
The list of reports, from the first editors’ draft in 2021 to the stable 2025.10.
- Tokens Studio (opens in a new tab)
What the platform and the Figma plugin are, and the tools they work with.
- Tokens Studio, token format (opens in a new tab)
The 2 formats, the legacy default and how a project switches to the W3C format.
- Tokens Studio, sync with GitHub (opens in a new tab)
Pushing and pulling design tokens as JSON files, and which storage needs a paid plan.
- Tokens Studio, Figma variables (opens in a new tab)
Creating Figma variables from design tokens and the reverse, and the limits of each.
- React, using TypeScript (opens in a new tab)
Giving a React component’s props TypeScript types.
The comparison’s proof
- IBM CarbonTokens: Yes, IBM Carbon's source, checked November 8, 2026 (opens in a new tab)Agent Access: Yes, IBM Carbon's source, checked November 8, 2026 (opens in a new tab)Docs: Yes, IBM Carbon's source, checked November 8, 2026 (opens in a new tab)Guidance: Yes, IBM Carbon's source, checked November 8, 2026 (opens in a new tab)
- Atlassian Design SystemTokens: Yes, Atlassian Design System's source, checked November 8, 2026 (opens in a new tab)Agent Access: Yes, Atlassian Design System's source, checked November 8, 2026 (opens in a new tab)Docs: Yes, Atlassian Design System's source, checked November 8, 2026 (opens in a new tab)Guidance: Yes, Atlassian Design System's source, checked November 8, 2026 (opens in a new tab)
- Adobe Spectrum 2Tokens: Yes, Adobe Spectrum 2's source, checked November 8, 2026 (opens in a new tab)Agent Access: Yes, Adobe Spectrum 2's source, checked November 8, 2026 (opens in a new tab)Docs: Yes, Adobe Spectrum 2's source, checked November 8, 2026 (opens in a new tab)Guidance: Yes, Adobe Spectrum 2's source, checked November 8, 2026 (opens in a new tab)
- Ant DesignTokens: Yes, Ant Design's source, checked November 11, 2026 (opens in a new tab)Agent Access: Yes, Ant Design's source, checked November 8, 2026 (opens in a new tab)Docs: Yes, Ant Design's source, checked November 8, 2026 (opens in a new tab)Guidance: Yes, Ant Design's source, checked November 8, 2026 (opens in a new tab)
- shadcn/uiTokens: Partly, shadcn/ui's source, checked November 8, 2026 (opens in a new tab)Agent Access: Yes, shadcn/ui's source, checked November 8, 2026 (opens in a new tab)Docs: Yes, shadcn/ui's source, checked November 8, 2026 (opens in a new tab)Guidance: Yes, shadcn/ui's source, checked November 8, 2026 (opens in a new tab)
- Chakra UITokens: Partly, Chakra UI's source, checked November 8, 2026 (opens in a new tab)Agent Access: Yes, Chakra UI's source, checked November 8, 2026 (opens in a new tab)Docs: Yes, Chakra UI's source, checked November 8, 2026 (opens in a new tab)Guidance: Yes, Chakra UI's source, checked November 8, 2026 (opens in a new tab)
- Shopify PolarisTokens: Partly, Shopify Polaris's source, checked November 8, 2026 (opens in a new tab)Agent Access: Yes, Shopify Polaris's source, checked November 8, 2026 (opens in a new tab)Docs: Yes, Shopify Polaris's source, checked November 8, 2026 (opens in a new tab)Guidance: Yes, Shopify Polaris's source, checked November 8, 2026 (opens in a new tab)
- Salesforce Lightning (SLDS)Tokens: Yes, Salesforce Lightning (SLDS)'s source, checked November 8, 2026 (opens in a new tab)Agent Access: No, Salesforce Lightning (SLDS)'s source, checked November 11, 2026 (opens in a new tab)Docs: Partly, Salesforce Lightning (SLDS)'s source, checked November 8, 2026 (opens in a new tab)Guidance: Yes, Salesforce Lightning (SLDS)'s source, checked November 11, 2026 (opens in a new tab)
- GitHub PrimerTokens: Yes, GitHub Primer's source, checked November 8, 2026 (opens in a new tab)Agent Access: Yes, GitHub Primer's source, checked November 8, 2026 (opens in a new tab)Docs: No, GitHub Primer's source, checked November 8, 2026 (opens in a new tab)Guidance: Yes, GitHub Primer's source, checked November 11, 2026 (opens in a new tab)
- Microsoft Fluent 2 (React v9)Tokens: Yes, Microsoft Fluent 2 (React v9)'s source, checked November 11, 2026 (opens in a new tab)Agent Access: No, Microsoft Fluent 2 (React v9)'s source, checked November 11, 2026 (opens in a new tab)Docs: Yes, Microsoft Fluent 2 (React v9)'s source, checked November 8, 2026 (opens in a new tab)Guidance: Partly, Microsoft Fluent 2 (React v9)'s source, checked November 8, 2026 (opens in a new tab)
- Google Material 3 (web)Tokens: Partly, Google Material 3 (web)'s source, checked November 8, 2026 (opens in a new tab)Agent Access: No, Google Material 3 (web)'s source, checked November 8, 2026 (opens in a new tab)Docs: Partly, Google Material 3 (web)'s source, checked November 8, 2026 (opens in a new tab)Guidance: No, Google Material 3 (web)'s source, checked November 8, 2026 (opens in a new tab)
- GOV.UK Design SystemTokens: Partly, GOV.UK Design System's source, checked November 8, 2026 (opens in a new tab)Agent Access: No, GOV.UK Design System's source, checked November 8, 2026 (opens in a new tab)Docs: No, GOV.UK Design System's source, checked November 8, 2026 (opens in a new tab)Guidance: No, GOV.UK Design System's source, checked November 8, 2026 (opens in a new tab)
Sources for this entry
- Ant Design’s llms.txt (opens in a new tab)
One of the 48 ratings, Ant Design’s Docs points.
Continue this reading path
Selection and fit
Selection and fit
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. “Sources behind the AI-ready design systems ranking.” Reviewed . https://bestaireadydesignsystems.com/sources/