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claude-plugins/composer/templates/design-system/components.md
movq 92f005895c feat(composer): expand ui-system from placeholder to full interview 
ui-system skill is no longer a placeholder. Full design-system and
interaction-design interviews with branching, defaults, batched
question clusters, and an 'accept default / skip' protocol so users
move through fast when they have taste and patient when they don't.

Design system interview covers: visual posture, color (with WCAG
contrast verification before writing), typography, spacing, radii,
shadows, density, visual motion, components, theming, and
accessibility tokens (focus ring, hit targets).

Interaction design interview covers: input model, state-surface
declarations per action class, motion posture and triggers,
breakpoints, i18n, four state postures (empty/loading/error/offline),
time formatting, keyboard policy, optimistic-update strategy with
rollback and conflict resolution, gestures, focus management,
notification patterns, selection, and drag-and-drop.

Reference banks for "make it look like Linear/Notion/Stripe/etc."
translate well-known products into starting tokens — user still
confirms each value, no silent invention.

Templates expanded to hold the full output:
- design-system/SKILL.md grew sections for accessibility tokens,
  density, dark-mode mapping, contrast verification, theming variants
- design-system/tokens.ts now exports color (light + dark), typography
  (family/size/weight/line-height/letter-spacing), spacing + density-
  aware padding tokens, radii, shadows, motion (durations + easings),
  z-index scale, breakpoints, hit-target minimums
- design-system/components.md gained anatomy/state/a11y coverage for
  10 primitives plus an "adding a new component" workflow and a
  "patterns to avoid" list (nested cards, color-only meaning, etc.)
- interaction-design/SKILL.md gained sections for optimistic updates,
  conflict resolution, gestures, focus management, notification
  patterns, selection/multi-select, and drag-and-drop

Hard rules: never invent on the user's behalf; <TBD> instead. Verify
contrast before writing color tokens. Always declare prefers-reduced-
motion as honored.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-29 21:10:36 -05:00

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Component vocabulary

The named components for . Component names match ia.md where applicable. Do not introduce new components without proposing them here first.

This file is a sidecar of the design-system skill — agents generating UI should be aware of every component in this list and prefer them to ad-hoc one-offs. New patterns belong here, not in mock files.

How to read this

For each component:

  • Variants — distinct visual flavors with different semantic meaning
  • Sizes — usually sm / md / lg; pick the same scale across components
  • States — every visible state the component must handle
  • Anatomy — the named slots / regions the component is composed of
  • Tokens used — which design-system tokens this component reads
  • A11y notes — load-bearing accessibility rules for this component

Primitives

Button

  • Variants: primary | secondary | ghost | destructive | link
  • Sizes: sm | md | lg
  • States: default | hover | active | focus | focus-visible | disabled | loading
  • Anatomy: optional leading icon · label · optional trailing icon · optional loading spinner
  • Tokens used: color.brand.primary, color.semantic.error (destructive), color.focus, padding.default, radius.md, motion.duration.fast, fontSize.sm/base/lg, fontWeight.medium
  • A11y:
    • Hit target ≥ hitTarget.mobile for md+ sizes
    • aria-busy while loading; preserve label
    • aria-disabled rather than disabled if the action is permission-gated rather than form-invalid
    • link variant uses <a>, not <button>

Input

  • Variants: text | textarea | select | checkbox | radio | toggle | password | number | date
  • Sizes: sm | md | lg
  • States: default | focus | filled | disabled | readonly | error | success (rare)
  • Anatomy: label · (optional) description · field · (optional) helper text · (error or hint) message
  • Tokens used: color.neutral.*, color.semantic.error, color.focus, padding.default, radius.sm, fontSize.base
  • A11y:
    • Label is always present (visible or aria-label)
    • Error message is aria-describedby-linked to the field
    • aria-invalid="true" while error
    • Required fields marked in two ways (asterisk + required attribute)
    • aria-describedby for helper text

Card / Surface

  • Variants: flat | bordered | elevated (per design-system shadow posture)
  • States: default | hover (if interactive) | focus (if interactive) | disabled
  • Anatomy: optional header · body · optional footer · optional media region
  • Tokens used: color.neutral.*, radius.lg, shadow.sm (elevated), padding.loose
  • A11y:
    • If clickable, the entire card is one <button> or <a> — not nested interactives
    • If contains interactives, card itself is not clickable

Badge / Tag

  • Variants: neutral | success | warning | error | info | brand
  • Sizes: sm | md
  • States: default | (removable) with close button
  • Anatomy: optional dot · label · optional close button
  • Tokens used: color.semantic.*, radius.pill, fontSize.xs, fontWeight.medium

Avatar

  • Variants: image | initials | placeholder
  • Sizes: xs | sm | md | lg | xl
  • States: default | with status indicator
  • Anatomy: image / initials · (optional) status dot
  • Tokens used: radius.full, color.neutral.* (fallback bg), fontSize.* (initials sizing)
  • A11y: alt text required for image variant; meaningful or empty alt="" for purely decorative

Tooltip

  • Variants: default | error | info
  • States: hidden | shown
  • Anatomy: trigger · floating panel · optional arrow
  • Tokens used: color.neutral.900 bg, color.neutral.50 text, radius.sm, shadow.md, motion.duration.fast
  • A11y:
    • role="tooltip", aria-describedby on trigger
    • Show on hover AND focus (keyboard parity)
    • Dismissible with Esc
    • Never the only conveyance of critical information

Modal / Drawer / Popover

These are behavioral patterns — see the interaction-design skill for when to use which. The visual styling is here.

  • Modal:
    • Anatomy: backdrop · panel · optional header · body · optional footer · close button
    • Tokens: shadow.xl, radius.lg, motion.duration.default, zIndex.modal
    • Always traps focus; restores on close
  • Drawer:
    • Anatomy: backdrop · panel (side-anchored) · header · body · footer · close button
    • Tokens: shadow.xl, motion.duration.default, zIndex.drawer
  • Popover:
    • Anatomy: trigger · floating panel · optional arrow
    • Tokens: shadow.md, radius.md, zIndex.popover

Tabs

  • Variants: underline | pills | enclosed
  • States: active | inactive | hover | focus | disabled
  • Anatomy: tab list · tab · panel
  • A11y:
    • role="tablist", role="tab", role="tabpanel"
    • Arrow-key navigation between tabs (per WAI-ARIA Authoring Practices)
    • Tab aria-selected and tabindex managed appropriately

Menu / Dropdown

  • Variants: default | with-icons | with-shortcuts | submenu
  • States: closed | open
  • Anatomy: trigger · floating panel · menu items · separators
  • Tokens used: shadow.md, radius.md, padding.tight, zIndex.dropdown
  • A11y:
    • role="menu", role="menuitem"
    • Arrow-key navigation; Esc closes
    • Type-ahead is encouraged
    • Focus returns to trigger on close

Toast / Notification

  • Variants: default | success | warning | error | info
  • Anatomy: optional icon · title · optional description · optional action button · close button
  • Tokens used: color.semantic.*, radius.md, shadow.lg, motion.duration.default, zIndex.toast
  • A11y:
    • role="status" for non-critical, role="alert" for critical
    • Dismissible by user; don't auto-dismiss critical errors
    • Stack region is aria-live="polite" (or assertive for errors)

Project-specific components

  • Variants:
  • Sizes:
  • States:
  • Anatomy: <slots / regions>
  • Tokens used:
  • A11y:
  • Notes:

Patterns to avoid

Things that come up often and should be vetoed by default. Saves the agent from re-inventing them.

  • Nested cards — flatten or use sections; visual hierarchy comes from spacing and dividers, not stacking surfaces
  • Inline icons in body text — icons in body text rarely scale or align well; use them in headers, buttons, badges
  • Modal-from-modal — if a modal needs to launch another modal, the first modal is doing too much
  • Tooltip as the only conveyance — tooltips are supplementary; the primary information must be available without hover
  • Color-only meaning — every color-coded distinction needs a redundant signal (icon, label, position)
  • Custom focus rings that don't meet contrast — use the system focus-ring token
  • Animation that violates prefers-reduced-motion — always honor the user preference
  • Click targets below 44px on touch devices

Adding a new component

  1. Propose it here first with the same shape as the others (variants, states, anatomy, tokens, a11y).
  2. Add it to tokens.ts if it needs new tokens.
  3. Add a mock that uses it before writing real-code implementation.
  4. Council review (Maya for a11y, Marge for end-user) before locking in.
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