Direct answer
Improve Cursor-generated UI by separating project rules from the current screen task. Give Cursor the components and standards. Ask for an observable outcome, then inspect every changed state in the browser. Revise using evidence such as clipping or missing focus.
What belongs in Cursor rules?
Project rules should contain durable instructions that apply repeatedly: component locations, semantic-token requirements, accessibility expectations, verification commands, and boundaries around shared files. Keep rules focused and scoped to the files they govern.
The task prompt should contain the current user, screen, outcome, and acceptance criteria. Mixing every product fact into one always-loaded rule dilutes the guidance the agent needs now.
What workflow should Cursor follow?
The design-system agent loop
Cursor should retrieve the system, make one bounded change, and return evidence from code and browser review.
- Load system: Read the relevant rules, tokens, components, and guidance.
- Scope task: Define one user outcome and the files or behavior in scope.
- Build: Reuse existing patterns and keep the diff bounded.
- Review: Inspect the diff, browser states, and project checks.
How do you connect design tools through MCP?
Cursor supports MCP tools and remote HTTP servers. Use a project configuration when the design context belongs to one repository, or a global configuration when the same tool should be available across projects.
Connect Better Design so Cursor can retrieve a design system, UI and UX principles, icon guidance, and review rules while it works. Keep tool permissions narrow and review what each server can access.
What should a useful Cursor UI prompt include?
The prompt provides intent, existing source, action hierarchy, required states, viewport, and evidence. It avoids vague adjectives such as clean or modern that leave the important decisions unresolved.
Build the account onboarding form for first-time workspace owners. Use the existing form primitives and semantic tokens. Keep workspace creation as the primary action. Load form and hierarchy guidance before coding. Include empty, invalid, submitting, and success states. Test keyboard flow and the 390px layout, then report changed files and browser evidence.Which states should Cursor inspect?
- The default screen with realistic content and long labels.
- Loading, empty, error, disabled, and success states that the flow can reach.
- Menus, dialogs, popovers, and validation after user interaction.
- Keyboard focus order and visible focus at every interactive element.
- Narrow, medium, and wide layouts without clipping or lost actions.
How should you ask Cursor for revisions?
Describe evidence instead of taste. Say which control clips at 390px, which focus indicator is missing, which token was bypassed, or which new component duplicates an existing one. A specific failure gives the agent a bounded cause to fix.
Ask Cursor to explain the cause and show the resulting diff. Repeated broad requests to make it better often add more one-off styling without resolving the system problem.
What can Cursor checks not prove?
TypeScript, lint, unit tests, and automated accessibility checks catch important failures. They cannot prove that the hierarchy is obvious, the content is understandable, or every overlay looks right over real data. Finish with hands-on browser review.
Questions
Do Cursor rules replace a design system?
No. Rules tell the agent where the design system lives and how to work. The design system supplies the actual tokens, components, and visual decisions.
Should every Cursor UI prompt include a screenshot?
No. Screenshots help when direction is unclear, but existing product screens, tokens, components, and explicit behavior are often better evidence for changes inside an established app.
Can Better Design replace Cursor's coding tools?
No. Better Design supplies design context and review guidance. Cursor still reads the codebase, edits files, runs commands, and implements the feature.
Why does Cursor-generated UI drift between screens?
Drift usually appears when prompts carry temporary style preferences but the repository lacks reusable tokens, components, rules, and a review gate. Put durable decisions in the system instead of repeating adjectives.