1. The Big Picture | Design System Guide

How a design system connects product intent, reusable decisions, and implementation.

A design system is a shared product-design infrastructure.

It is not just a Figma file.

It is not just a React component library.

It is not just a collection of colors and fonts.

A mature design system connects:

brand
product design
UX principles
content rules
design tokens
reusable components
accessibility
engineering conventions
documentation
testing
releases
contribution workflows
governance
analytics

A useful mental model is:

Diagram source

Mermaid

flowchart TD
    A[Brand & Product Principles]
    B[Design Language]
    C[Design Tokens]
    D[Primitive Components]
    E[Composite Components]
    F[Patterns]
    G[Templates]
    H[Product Experiences]
    I[Documentation]
    J[Testing]
    K[Governance]
    L[Analytics]

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

    I -. explains .-> C
    I -. explains .-> D
    I -. explains .-> E
    I -. explains .-> F

    J -. validates .-> D
    J -. validates .-> E
    J -. validates .-> F

    K -. controls change .-> C
    K -. controls change .-> D
    K -. controls change .-> E

    H --> L
    L --> K

The design system sits between product intent and product implementation.