design-system

Works two ways:

1. Standalone — user runs /gsp:design-system for a quick workspace audit
2. Building block — /gsp:start invokes this in the background during project setup

Output is workspace-level (not project-scoped), so it's shared across all projects and only needs to run once per codebase state change. Re-runnable — overwrites previous output.

Output: .design/system/{STACK,COMPONENTS,TOKENS,CONVENTIONS,CONCERNS}.md

<execution_context> @${CLAUDE_SKILL_DIR}/../../templates/system/STACK.md @${CLAUDE_SKILL_DIR}/../../templates/system/COMPONENTS.md @${CLAUDE_SKILL_DIR}/../../templates/system/TOKENS.md @${CLAUDE_SKILL_DIR}/../../templates/system/CONVENTIONS.md @${CLAUDE_SKILL_DIR}/../../templates/system/CONCERNS.md </execution_context>

mkdir -p .design/system

Step 1: Detect tech stack (→ STACK.md)

1. Detect package manager & lockfile

   • Look for package.json, bun.lockb, pnpm-lock.yaml, yarn.lock, package-lock.json

2. Read package.json

   • Framework, dependencies, devDependencies, scripts

3. Detect config files

   • tsconfig.json / jsconfig.json — language, aliases
   • tailwind.config.* — styling, custom theme
   • next.config.* — Next.js
   • vite.config.* — Vite
   • app.json / expo.json — React Native / Expo
   • postcss.config.*, .eslintrc.*, .prettierrc.*

4. Identify styling approach

   • Tailwind, CSS Modules, styled-components, StyleSheet, vanilla CSS

5. Identify architecture patterns

   • Component style (functional, forwardRef, compound)
   • State management (Context, Zustand, Redux, Jotai)
   • Data fetching (Server Components, React Query, SWR)
   • Routing (App Router, Pages Router, Expo Router, React Router)
   • File organization (feature-based, type-based, flat)

6. Classify codebase

   • greenfield: No package.json or empty scaffold with no custom code
   • boilerplate: Scaffolded (create-next-app, create-expo-app, etc.) with minimal customization
   • existing: Real custom code — components, pages, business logic

7. Write .design/system/STACK.md from the STACK template

Step 2: Scan components (→ COMPONENTS.md)

1. Scan component directories

   • Check: src/components/, components/, app/, pages/, src/app/, src/pages/, src/ui/, lib/

2. For each component found

   • Name, path, rough props/variants, reusability assessment

3. Detect UI kit

   • shadcn/ui, RN Reusables, Radix, MUI, Headless UI, etc.
   • Check package.json dependencies + component directory patterns

4. Cap at 30 components — summarize rest by directory/category

5. "Where to add" guidance

   • Where new components go, naming pattern, barrel file conventions

6. Write .design/system/COMPONENTS.md from the COMPONENTS template

Step 3: Detect tokens & theming (→ TOKENS.md)

1. Tailwind extend sections — colors, fonts, spacing

2. CSS custom properties in globals.css / global.css

3. Theme files — theme.ts, tokens.json, tokens.ts

4. Dark mode setup — next-themes, class strategy, media query

5. Prior GSP tokens — scan .design/branding/*/patterns/ for existing brand tokens

6. Write .design/system/TOKENS.md from the TOKENS template

Step 4: Extract conventions (→ CONVENTIONS.md)

1. Naming patterns — PascalCase, kebab-case, camelCase across files

2. Export style — named, default, barrel files

3. Styling approach — cn(), className strings, StyleSheet

4. Import aliases — @/, ~/ from tsconfig/jsconfig

5. File organization — feature-based, type-based, flat

6. "Where to add" for each type — component, page, utility, token

7. Write .design/system/CONVENTIONS.md from the CONVENTIONS template

Step 5: Identify concerns (→ CONCERNS.md)

1. Design debt — inconsistent spacing, mixed color systems, hardcoded values vs tokens
2. Component fragility — components with excessive props, no variants, tight coupling
3. Accessibility gaps — missing aria attributes, color contrast issues, no focus management
4. Token coverage — which categories are tokenized vs hardcoded
5. Dark mode gaps — components that don't support theme switching
6. Responsive gaps — components with fixed widths, missing breakpoints
7. Naming inconsistencies — mixed conventions across component directories

Each concern includes: file paths, severity (high/medium/low), and fix approach.

8. Write .design/system/CONCERNS.md from the CONCERNS template

Greenfield shortcut: If codebase is classified as greenfield (no package.json or no source code), write minimal versions of STACK.md and skip COMPONENTS, TOKENS, CONVENTIONS, and CONCERNS (write a one-line note in each: "Greenfield codebase — no existing design system to document.").

Step 6: Completion display

Display a summary box:

  /gsp: design-system scan complete

  ┌──────────────────────────────────────────┐
  │  type           {classification}         │
  │  framework      {framework}              │
  │  styling        {styling approach}       │
  │  components     {N} detected             │
  │  token coverage {N}/6 categories         │
  │  concerns       {N} high, {N} medium     │
  └──────────────────────────────────────────┘

  output: .design/system/

Use plain text with Unicode box-drawing characters (┌──┐│└──┘) for the summary box.