How to keep AI-generated React UI consistent with a design system

A list of colors and a font name is not yet a design system. Generation becomes more predictable when those choices are assigned roles: background, surface, foreground, muted text, border, primary action, destructive action, focus ring, and status feedback.

The same applies to typography, spacing, and radius. Define a small hierarchy and explain where each level is used. Semantic rules give the generator constraints it can apply across different screen types instead of copying one visual example literally.

Document how buttons, inputs, tables, dialogs, navigation, cards, and feedback states behave. Include density, label placement, icon usage, focus treatment, validation, destructive confirmation, empty states, and loading patterns.

When multiple generated pages share those rules, reviewers can focus on product decisions rather than repeatedly correcting basic styling and component composition.

U2C Design DNA stores semantic colors, typography choices, component rules, and generation constraints. Binding it to a project gives later screens and follow-up edits the same baseline without pasting a long style prompt into every request.

A saved system should still be versioned deliberately. If a color role, radius, or component rule changes, review the effect on existing screens before treating the new value as the default.

Review generated screens for token usage, component consistency, hierarchy, responsive composition, accessibility states, and edit locality. A targeted edit should not silently restyle unrelated sections.

Track failures by category and update the system rule that would prevent them. This turns one-off corrections into reusable guidance and makes future generation more consistent.