Setup design system

Design System Workflow

Initialize or extend the project's design system with properly accessible, consistent UI components using Tailwind CSS and shadcn/ui.

Step 0: Verify Feature Branch

Ensure we are on a feature branch based on the latest main:

git fetch origin main

If on main, create a new feature branch:

git checkout -b feature/design-system origin/main

If already on a feature branch, rebase onto latest origin/main:

git status --porcelain

If the working tree is dirty, stash before rebasing:

git stash push -m "setup-design-system: stash before rebase"
git rebase origin/main
git stash pop

If the working tree is clean, rebase directly:

git rebase origin/main

Step 1: Assess Current State

Check if a design system already exists:

• Look for packages/ui/ directory structure
• Check for shadcn/ui configuration (components.json)
• Check Tailwind configuration (src/index.css for @theme directives in v4, or tailwind.config.* for v3)
• Identify existing components and their patterns
• Check for design tokens (colors, spacing, typography definitions)

Ask the user:

• Initializing a new design system or extending the existing one?
• If extending: what components or patterns are needed?
• Any brand guidelines, color palette, or Figma designs to reference?
• Dark mode support needed?

Step 2: Product Council Design Review (for initialization or major changes)

If initializing the design system or making significant structural changes, activate a Product Council subset:

Model Selection: See the Model Selection section in README.md for mapping agent model specs to Task tool parameters.

Design Lead (Lead) — consult: ui-design

• Brand Identity: Color palette, typography, visual language
• Component Hierarchy: Primitives vs composed components
• Design Tokens: Token architecture (colors, spacing, typography, shadows)
• Recommendations: Design system structure and principles

Frontend Specialist — consult: frontend-mobile-development

• Technical Architecture: Component library structure, build pipeline
• Framework Integration: Vite + React 19 compatibility, tree-shaking
• Recommendations: Implementation patterns, tooling choices

Product Strategist

• User-Facing Priorities: Which components are needed first?
• Brand Consistency: Does this align with product vision?
• Recommendations: Prioritization of design system investment

CHECKPOINT: Present the design system architecture proposal to the user. Wait for approval of structure and token definitions before building.

Step 3: Design System Infrastructure

If initializing a new design system:

Invoke /ui-design:design-system-setup for initialization guidance.

Set up the foundation:

Design Tokens

• Color palette (primary, secondary, neutral, semantic: success/warning/error/info)
• Typography scale (font families, sizes, weights, line heights)
• Spacing scale (consistent spacing values: 0, 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64)
• Border radii (none, sm, md, lg, xl, full)
• Shadows (sm, md, lg, xl)
• Breakpoints (sm, md, lg, xl, 2xl)

Tailwind Configuration Using /frontend-mobile-development:tailwind-design-system:

• Extend the Tailwind theme with design tokens
• Configure shadcn/ui with project-specific theme colors
• Set up CSS custom properties for runtime theming
• Configure dark mode strategy (class-based or media-query)

Component Structure

packages/ui/src/
├── components/
│   ├── primitives/    # Button, Input, Badge, Label, Switch
│   ├── layout/        # Container, Grid, Stack, Spacer, Divider
│   ├── navigation/    # Navbar, Sidebar, Breadcrumb, Tabs
│   ├── feedback/      # Alert, Toast, Modal, Dialog, Skeleton
│   ├── data-display/  # Card, Table, List, Avatar, Tooltip
│   └── forms/         # Form, FormField, Select, Checkbox, Radio
├── tokens/            # Design token definitions
├── hooks/             # Shared UI hooks (useMediaQuery, useTheme)
└── utils/             # UI utilities (cn, cva variants)

If extending an existing design system:

Read the existing patterns and conventions before adding new components. Match the established API patterns.

Step 4: Build Components

For each component needed, follow this process:

4a. Component Design

Invoke /ui-design:create-component for guided component creation.

Define the component API:

• Props interface: All configurable options with TypeScript types
• Variants: Size, color, and style variants (using cva or tailwind-variants)
• Default values: Sensible defaults that work out-of-the-box
• Composition: How it works with child components

4b. Implementation

Build each component with:

• Full TypeScript typing (no any types)
• Tailwind CSS styling with shadcn/ui patterns
• React.forwardRef for ref forwarding
• className prop merged with cn() utility for style overrides
• Responsive behavior using Tailwind breakpoints

4c. Accessibility

Every component must include:

• Semantic HTML elements (button, nav, dialog, etc.)
• ARIA attributes (aria-label, aria-describedby, role, etc.)
• Keyboard navigation (Tab, Enter, Escape, Arrow keys as appropriate)
• Focus management (visible focus ring, focus trap for modals)
• Screen reader announcements for dynamic content
• Color contrast meeting WCAG AA (4.5:1 for text, 3:1 for large text)
• Touch target minimum size (44x44px for interactive elements)

4d. Tests

For each component, write:

• Render test: Component renders without errors
• Props test: All variants and prop combinations render correctly
• Interaction test: Click, hover, keyboard interactions work
• Accessibility test: ARIA attributes present, keyboard nav works

CHECKPOINT: After each component (or batch of related components), present the implementation to the user for visual review. Show the component API, variants, and accessibility features.

Step 5: Accessibility Audit

After all components are built, run a comprehensive accessibility audit:

Invoke /ui-design:accessibility-audit on all new/modified components.

Check for:

• WCAG 2.1 AA compliance (minimum standard)
• Color contrast: All text meets contrast ratios
• Keyboard navigation: Complete keyboard operability
• Screen reader: All interactive elements announced correctly
• Focus management: Logical focus order, visible focus indicators
• Motion: Respect prefers-reduced-motion media query
• Touch targets: Minimum 44x44px on mobile

CHECKPOINT: Present accessibility audit findings. User approves the accessibility posture or requests changes.

Step 6: Design Review

Invoke /ui-design:design-review to review the overall design system for:

• Consistency: All components follow the same patterns
• Naming: Props, variants, and CSS classes follow conventions
• API patterns: Consistent prop interfaces across components
• Visual coherence: Components look like they belong together
• Completeness: Common use cases are covered

Address any findings from the review.

Step 7: Documentation

Document the design system:

• Component catalog: Each component with props table, usage examples, and do/don't patterns
• Design tokens: Complete reference of colors, typography, spacing
• Accessibility guide: Per-component accessibility notes and testing instructions
• Getting started: How to import and use components in the app

Step 8: Commit

Commit with conventional commit format:

For new design system:

feat(ui): initialize design system with core components

For new components:

feat(ui): add <component-name> component

For design token changes:

feat(ui): update design tokens for <change-description>

Step 9: Hand Off — STOP Here

[!CAUTION] This skill's work is done. Do NOT proceed to create a pull request, push to remote, or run a code review. Those are separate skills with their own workflows and checkpoints.

Present the next step to the user:

• Recommended: Run /review-code for multi-perspective quality and accessibility review before submitting
• If building a feature that uses these components: Continue with /build-feature to implement the feature, then run /review-code
• If this is standalone design system work: Run /review-code → /submit-pr

[!TIP] Pipeline: /plan-feature → /build-feature or /build-api → /review-code → /submit-pr

/setup-design-system can be run at any point in the pipeline or independently. You are here — proceed to /review-code when ready.

Do not push the branch, create a PR, or invoke /submit-pr from within this skill.