Answer in brief
Salesforce Lightning (SLDS) rates Yes on design tokens and guidance, Partly on docs and No on agent access. Its design tokens ship as JSON, CSS, Swift and Kotlin, and its starter kits carry an AGENTS.md and skills; the Salesforce DX MCP server that held its agent tools reached its end of life on November 2, 2026. The docs an agent can read are on Salesforce’s developer portal, not on the SLDS site, and its typed props rate Partly, because SLDS itself is CSS and HTML blueprints.
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.
The five signs, with their proof
The comparison rates four and the research adds typed props. The pages below were opened on November 8, 2026, and those for agent access and guidance again on November 11, 2026.
- Design tokens: Yes.
@salesforce-ux/design-tokens(opens in a new tab) 4.1.0 ships raw and flat JSON, CSS, Swift and Kotlin. It is not in the W3C format, and it carries its own license. - Agent access: No. The official Salesforce DX MCP server,
@salesforce/mcp, carried SLDS tools such asexplore_slds_blueprintsandexplore_slds_stylinguntil it reached its end of life (opens in a new tab) on November 2, 2026. Salesforce now delivers that tooling as skills, which count toward guidance here, not agent access. - Docs agents can read: Partly. The SLDS site has no llms.txt. Salesforce’s developer portal does, and its LWC file (opens in a new tab) lists SLDS’s styling hooks, design tokens and blueprints as Markdown pages.
- Guidance for agents: Yes. The official starter kit (opens in a new tab) carries an AGENTS.md aimed at building UI with SLDS, a CLAUDE.md and SLDS skills to apply, validate and migrate to SLDS 2, and the SLDS site describes the same three on its AI Development Skills (opens in a new tab) page.
- Typed props: Partly. SLDS is CSS and HTML blueprints, not a typed component library, and
@salesforce/design-system-reactships no types. The matching Lightning base components (opens in a new tab) document their attributes, methods and events.
How to read its evidence
Two of its ratings moved with Salesforce’s own tooling. The Agent access Yes fell to No when Salesforce retired its MCP server, a change the research found on November 11, 2026, nine days after the end of life. The Guidance Yes now rests on two sources: the starter kit, and the SLDS site’s skills page, which serves its text only to a full browser. The main SLDS repository on GitHub is archived, and its licensing is mixed: BSD 3-Clause for the CSS package, its own terms for the design tokens, Apache 2.0 for the starter kits and the linter.
What it suits best
Salesforce platform teams building Lightning Web Components, who get design tokens, a linter and skills, and read the agent docs from the developer portal.
Check before you choose it
- The design tokens’ own license, before any reuse outside Salesforce.
- That no part of your pipeline still calls the retired MCP server, whose last version runs pinned but gets no fixes; the skills replace it, and Salesforce says they change often.
- That your agent is pointed at the developer portal’s files, since the SLDS site serves its pages’ text only to a full browser.
Questions & answers
The llms.txt files are on developer.salesforce.com, and they cover SLDS’s styling hooks, design tokens and blueprints as Markdown pages. The SLDS site itself has no llms.txt. The comparison’s rule gives Partly when the readable files are on another of the maker’s sites.
Salesforce retired the Salesforce DX MCP server, `@salesforce/mcp`, on November 2, 2026, and marked its npm package deprecated. Its SLDS tools went with it. Salesforce now ships skills, which this comparison rates under Guidance, and an agent connection is what the Agent access rating asks for.
Check first. `@salesforce-ux/design-tokens` points at its own license file instead of a standard license, while the CSS package is under BSD 3-Clause. Read that file before an agent copies the design tokens into a product outside Salesforce.
Sources for this entry
- @salesforce-ux/design-tokens 4.1.0, file list (opens in a new tab)
The Design tokens rating, Yes; JSON, CSS, Swift and Kotlin files.
- End of life for the Salesforce DX MCP server (opens in a new tab)
The Agent access rating, No; the server's end of life on November 2, 2026, and skills in its place.
- SLDS tools in the Salesforce DX MCP docs (opens in a new tab)
The one beta SLDS tool left on the page, which it says a skill supersedes.
- Salesforce’s llms file for Lightning Web Components (opens in a new tab)
The Docs rating, Partly; SLDS pages as Markdown on the developer portal.
- SLDS starter kit for Lightning Web Components (opens in a new tab)
The Guidance rating, Yes; its AGENTS.md and skills.
- SLDS AI Development Skills (opens in a new tab)
The Guidance rating, Yes; the three SLDS skills on the SLDS site itself.
- Salesforce’s llms file for Lightning base components (opens in a new tab)
The Typed props rating, Partly; the base components’ documented attributes.
Continue this reading path
Agent access and docs
Tokens and data
Selection and fit
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.
- Best AI Design System (opens in a new tab)A buyer’s guide to picking the one design system your agents follow
- Best AI-Ready Design Systems (opens in a new tab)The public systems scored out of 8 and ranked, every point sourced
- 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 Design Systems. “Salesforce Lightning Design System (SLDS).” Reviewed . https://bestaidesignsystems.com/directory/salesforce-lightning/