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Install Better Design MCP in Antigravity

Run npx better-design, or follow the Antigravity steps below.

Install from the terminal
Adds Better Design without replacing your other servers.
terminal
npx better-design

Or configure Antigravity manually

Use the Antigravity app or paste the settings below when you need to inspect every value.

Set up in one command
Run it in your terminal. It connects your coding tools and adds the rule that tells agents to use Better Design on every UI change.
terminal
npx -y better-design
Adding the server by hand? Paste this rule into CLAUDE.md or AGENTS.md too.
markdown
<!-- better-design:start -->
## Better Design

For every UI build, run these steps in order, and never present a page that skipped step 2 or 4:
1. Design system: keep the product's own design. Use its theme and components when the code has them, or its `extract-from-url` tokens for a live site. Only a product with no design of its own takes `find-design-system`, then `get-design-system-kit`.
2. Principles: `get-ui-principle` before styling, `get-ux-principle` before behavior.
3. Build. A product screen sits inside its app shell, with realistic sample data and an app-scale title.
4. Review: `get-review-rules`, `check-comprehension` and `inspect-spacing`. Fix every critical and serious finding.

Always use the Better Design MCP tools for any frontend, UI, UX, interaction, flow, form, navigation, dialog, error, onboarding, component, styling, article widget, calculator, estimator, converter, generator, quiz, checklist, React Native, Expo, Three.js, Shopify, or sales work, without me having to explicitly ask. For a calculator or article widget, load `get-widget-guide`; for React Native or Expo, load task guidance with `get-react-native-guide`; for Three.js or React Three Fiber, use `get-three-js-guide`; for Shopify Liquid or theme work, use `get-shopify-guide`; for sales conversations or assets, use `get-sales-principle`. Load visual guidance with `get-ui-principle`, load flow guidance with `get-ux-principle`, and self-review with `get-review-rules` and `check-comprehension`. Run `inspect-spacing` on rendered DOM evidence. For dashboards, deploy the exact source to a public HTTPS preview; `finalize-dashboard-review` must return VALID after Better Design captures it at 390, 1440, and 1728. Start UI builds with `find-design-system`. For a custom brand, call `create-design-system`, poll `get-design-system-status`, and run its React install command in coding hosts; in inline canvases, call `get-design-system-kit` with target `html` and the generated projectId. For a catalog system, call `get-design-system-kit` with target `react` in coding hosts or `html` in inline canvases. For a Shopify store, load `get-shopify-guide`, then call `get-design-system-kit` with target `shopify`.
<!-- better-design:end -->

Or add the server to Antigravity by hand:

Install from the Antigravity app

  1. 1

    Open Settings

    Select Settings in the bottom-left corner.
  2. 2

    Open Customizations

    In the settings sidebar, choose Customizations.
  3. 3

    Open the MCP config

    Scroll to Installed MCP Servers and select Open MCP Config. Antigravity shows ~/.gemini/config/mcp_config.json in your file manager. Add MCP opens the built-in catalog, which does not list Better Design.
  4. 4

    Paste the block and refresh

    Merge the JSON below into the file and save it. Select the refresh icon next to Add MCP, then confirm better-design shows a green dot.

Need more detail? Read the official Antigravity MCP documentation.

Config
json
{
  "mcpServers": {
    "better-design": {
      "serverUrl": "https://better-design.com/api/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>",
        "X-Better-Design-Client": "antigravity"
      }
    }
  }
}