Final Mental Model

Connect product principles to reusable building blocks, then put the system into practice.

If you remember only one diagram, remember this:

Diagram source

Mermaid

flowchart TD
    A[Product / Brand Principles]
    B[Design Language]
    C[Design Tokens]
    D[Accessible Primitives]
    E[Reusable Components]
    F[Patterns]
    G[Product UI]
    H[Documentation]
    I[Testing]
    J[Governance]
    K[Analytics]

    A --> B --> C --> D --> E --> F --> G

    H -. teaches .-> C
    H -. teaches .-> E
    I -. protects .-> D
    I -. protects .-> E
    J -. evolves .-> C
    J -. evolves .-> E
    G --> K
    K -. informs .-> J

A design system is not a folder full of UI components.

It is a feedback-driven system for turning product decisions into reusable, documented, accessible, testable, and governable building blocks.

Suggested build exercise

Build a small production-style system with:

Tokens
├── color
├── spacing
├── typography
├── radius
├── shadow
└── motion

Components
├── Button
├── Badge
├── Avatar
├── Input
├── Textarea
├── Checkbox
├── Radio
├── Switch
├── Select
├── Tooltip
├── DropdownMenu
├── Dialog
├── Tabs
└── Toast

Infrastructure
├── Storybook
├── Vitest
├── Testing Library
├── axe accessibility tests
├── Playwright
├── visual regression
├── Changesets
└── CI

Then build one real application screen entirely using the system.

That exercise will teach more than memorizing component names from a roadmap.

Suggested build exercise

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