Storybook's role in design system infrastructure

WHAT THIS TESTS This checks whether you see a component explorer as core infrastructure connecting building, documenting, and testing, or just a sandbox.

A GOOD ANSWER COVERS For developers building components, Storybook enables isolated development. You render a component in every state without launching the full application, navigating to a route, or seeding data, which tightens the feedback loop dramatically. It becomes the stable target for automated testing: visual regression tools snapshot stories, the interactions and test-runner addons drive and assert behavior, and the a11y addon flags accessibility violations as you work. For developers consuming components, it is living documentation: a browsable catalog with autodocs prop tables, live controls to experiment, and copyable code, all reflecting the real published component rather than a stale wiki. Crucially it is a shared review surface where designers verify visual fidelity, engineers verify behavior, and PMs sign off, all looking at the same deployed instance.

COMMON WRONG ANSWERS Describing it only as a playground for tinkering, missing its role in automated testing and documentation. Treating it as optional rather than the connective tissue of the system. Confusing it with a full app environment.

LIKELY FOLLOW-UPS How does Storybook integrate with CI. How do you keep stories from going stale. How does it support visual regression and accessibility testing.

ONE CONCRETE EXAMPLE A developer building a Select renders open, disabled, and error states in isolation, the a11y addon flags a missing label live, Chromatic snapshots each story on every PR, and a consuming team browses the deployed Storybook to copy the exact props they need, all from one published artifact.