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What makes UI documentation AI-ready?
A useful component description is a practical contract for designers, developers, and AI tools. It connects the visible asset to its purpose, permitted configurations, behavior, and constraints. Figma’s guidance notes that an agent may recognize a component’s appearance without understanding its intended purpose, so appearance alone is not enough.
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For each component, record the facts a person would otherwise have to infer. Use actual properties and rules from your system; do not invent an API to make a description seem complete.
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A component documentation pattern
- Name and purpose: Give the asset a stable, meaningful name and say what task it performs.
- Use and avoid: Explain when to choose it, when a similar component is more appropriate, and any meaningful exceptions.
- Properties and composition: List real variants, properties, slots, nested instances, and dependencies.
- States and behavior: Describe the states that actually exist—such as focus, disabled, loading, success, or error—and explain relevant interactions and keyboard behavior.
- Tokens and layout: Name semantic color, typography, spacing, and sizing roles. State responsive or layout rules that are not obvious from the asset.
- Accessibility expectations: Specify the expected accessible name, role, state changes, keyboard interaction, relevant relationships, and contrast requirements.
- Examples: Show a real use case and, where confusion is likely, a misuse or a better alternative.
- Ownership and freshness: Identify the source of truth and keep the description aligned with the published library and implementation.
This is a practical synthesis of Figma’s component-documentation guidance and W3C’s overview of accessibility semantics, not a formal standard. A written accessibility specification is not proof that an implementation conforms.
Make names, tokens, and rules communicate intent
Names should explain what an asset means, not merely where it sits or what it looks like. A name such as “primary action” communicates more useful intent than a position-based label such as “blue button on the right,” provided that it matches the system’s actual terminology.
Apply the same principle to variables. Semantic tokens such as a role-based surface or text color tell a model why a value is used; unexplained raw values leave it to infer purpose. Figma recommends reusable blocks, meaningful layer and component names, auto layout, defined properties and variants, and variables for color, spacing, and typography in its own agent workflow. Those are Figma-specific recommendations, not universal requirements for every design tool.
Document the choice between similar components directly. If one control is for a primary action and another is for a lower-priority action, state the distinction and the exceptions. A model should not have to derive that rule from screenshots or component names.
Separate component instructions from library-wide conventions
Keep purpose, states, and component-specific guidance with the component. Put rules that apply across the system—such as naming conventions, token-selection principles, composition order, platform differences, or prohibited patterns—in library-level guidelines or an equivalent source that the AI workflow can access.
Figma’s library-guidelines documentation describes Markdown, plain text, and JSON files for recording conventions that assets alone may not convey. Its guide also describes a combined 200 KB limit and a beta process; these operational details can change, so check Figma’s current guidance before relying on them. The broader principle is to make cross-library rules discoverable rather than duplicating them inconsistently across component descriptions.
Reusable blocks can also reduce guesswork. When a common composition repeatedly combines base components with a particular hierarchy or spacing, document that composition instead of expecting an agent to reconstruct the convention from isolated assets.
Document accessibility behavior, then validate it
A component specification should make accessibility expectations concrete. For an interactive component, describe the accessible name, role, state changes, keyboard interaction, and relationships that matter. WAI-ARIA explains how roles, states, properties, names, and descriptions are exposed through accessibility APIs; the relevant expectations still need to be checked in the implemented interface.
Do not treat a checklist or an AI-generated description as an accessibility test. Review the actual implementation and its behavior. W3C’s WAI-ARIA overview is a useful reference for the semantics to consider: WAI-ARIA overview.
Give the AI workflow access to the source of truth
Clear documentation cannot help a workflow that cannot retrieve it. Make the published library, component definitions, variables, and relevant guidelines available to the tool in a form it can use. Figma says its agent needs the library published to reference it. Its MCP documentation describes access to components, variables, and Code Connect mappings for AI tools; that describes Figma’s workflow, not a requirement shared by all tools.
Keep design guidance synchronized with the implementation. If the library changes but its descriptions do not, the extra context can become misleading. Review documentation when components, tokens, or behavior change, and make the current source of truth clear.
Start small and improve through an audit loop
Rather than documenting every asset at once, begin with one common component and trace whether the guidance helps an AI tool use it correctly. Figma’s context-design article recommends starting with a common component, documenting its tokens and use rules, auditing an AI-generated variant, and using the gaps to decide what to document next.
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- Choose a frequently reused component. Prefer one where an incorrect choice, state, or token would matter.
- Write its contract. Add its purpose, selection rules, actual variants and states, token roles, behavior, and accessibility expectations.
- Make the source available. Expose the library and applicable conventions through the workflow being used.
- Ask for a representative design or implementation. Check whether the result uses the existing component and follows documented rules.
- Audit the output. Look for invented properties, variants, components, tokens, or behavior, as well as omitted constraints.
- Update the documentation or system. Fix the source of any mismatch, then choose the next component based on the gaps observed.
Figma’s LLM context-design article attributes figures of 91% of developers and 92% of designers saying the design-to-code handoff process needed work to its 2025 AI report. Those figures describe the report’s respondents as presented by Figma; the article passage does not provide enough survey-method detail to assess them independently. They are not a measure of how much AI-ready documentation improves outcomes.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the guidance can—and cannot—establish
Figma’s official material gives concrete recommendations for its own agent and library workflows, including component documentation, variables, library guidelines, and MCP context. It does not establish a neutral comparison of design-system tools, nor does it show that a particular documentation format guarantees better results. The useful test for any workflow is whether it can access the real source of truth and whether its outputs can be checked against actual component and accessibility requirements.
W3C’s WAI-ARIA overview is relevant to accessibility semantics. Do not cite WCAG 3.0 as a finalized conformance standard on the basis of the cited Working Draft: W3C says that publication as a Working Draft does not imply endorsement and that it is work in progress. Check W3C’s current status if discussing that document.
Quick Recap
Sources and further guidance
- Figma: Use the Figma agent to create design systems documentation
- Figma: Refine components and variables for the Figma agent
- Figma: LLM context design
- Figma MCP developer documentation
- Figma: Add guidelines files to a design library
- W3C: WAI-ARIA overview
- W3C: WCAG 3.0 Working Draft
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