Prompt guide · Google Antigravity
The Google Antigravity prompt generator for verified one-pass builds
Antigravity's agents plan first and verify in a real browser — which is exactly why prompt structure matters: a thin prompt produces an impressive plan for a mediocre website.
WebsitePrompt generates a brief that gives the agent something worth executing: an exact design system, finished copy for every section, and instructions to verify each page in the browser preview at mobile and desktop widths before calling it done.
What a great Antigravity prompt includes
'Don't stop at the plan'
Antigravity produces planning artifacts. Telling it to execute through to a working site prevents a beautiful plan and no website.
Browser verification criteria
It can check its own work in a preview — give it concrete checks: renders at 375px and 1440px, no console errors.
Exact tokens, not vibes
Gemini-powered agents have strong style defaults. Exact hex values and named fonts override them; 'modern' doesn't.
Section-by-section specs
Each section described as a buildable unit (layout, content, behavior) maps cleanly onto the agent's task list.
Pre-written copy
Verification can't catch generic copy. Putting the real headlines in the brief can.
How WebsitePrompt handles this for you
When you pick Antigravity, your brief instructs the agent to execute past planning, verify each page in the browser preview at two widths, and fix console errors before finishing.
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