Threshold — AI Infrastructure Through the Doorway
Scroll walks you into a doorway of light in the fog until the whole screen floods white.
An AI infrastructure site whose hero pins while scrolling walks into a glowing doorway in the fog until the screen floods white and a light platform page begins; fog drifts away from the pointer, a routing diagram animates, a live request log streams and pricing follows. It is one self-contained HTML file — inline CSS and JavaScript, no framework and no build step — with one AI-generated hero image. Under the hood: Vanilla JS, sticky scroll-scrubbed "walk through the door" hero that floods to light, canvas fog that parts around the cursor, split-line headline reveals, simulated live request console. What a visitor can do: scroll to walk into the doorway until the screen floods white, move the pointer to push the fog and brighten the door, watch the live request log and sparkline stream, request access from the CTA form. Best for: AI infrastructure & API startups, Developer platforms, LLM gateways & MLOps tools, Technical SaaS launches. The exact image prompts are included, so the art can be regenerated or restyled with any image model.
Paste the prompt intoClaude CodeCursorAntigravityWindsurfLovableBoltv0
What's in the source
6 files — one self-contained page that opens in a browser, with the prompt that made it.
threshold-ai/ ├─ assets/ 1 file ├─ PROMPT.md ├─ index.html └─ … 3 more
How to run this
Nothing to install and nothing to configure. Works in any modern browser on Windows, macOS and Linux.
- Built with
- Single HTML file
- Requires
- A modern browser
- 1. Unzip the download.
- 2. Double-click index.html. It opens in your browser and runs. To serve it instead (some browsers want a server), run
npx serve .in the folder and openhttp://localhost:3000.
Note — Opens by double-clicking index.html: the CSS and JavaScript are inline and the hero art sits next to it in assets/. Its typefaces load from Google Fonts, with system fallbacks if they cannot. Upload the folder to any static host and it is live.
Questions about Threshold
Who is Threshold for?
Threshold is for AI and SaaS products, and for the designers, developers and agencies who build their sites. It's a foundation rather than a site for one business: ask your AI to make it about yours and it rewrites the copy, colours and images around the same build.
What is Threshold built with?
Threshold is built with HTML/CSS/JS. The source is a single HTML file: open it in a browser and it runs, with no build step. The prompt is written for coding agents such as Claude Code, Cursor and Antigravity.
Can I use Threshold for a client project?
Yes. Every purchase includes a commercial licence: use it in your own projects and in work you deliver to clients, including paid client work, change and rebrand it, and publish the result with no credit needed. What you can't do is resell, share or republish the prompt or the source files themselves.
Should I buy the prompt or the source?
The prompt is the written brief that built the design: paste it into a coding agent such as Claude Code, Cursor or Antigravity and it builds the site on your computer, which you then refine. The source is the finished project itself, ready to run exactly as the preview shows. The source always includes the prompt.
Will the prompt give me exactly the preview?
Not exactly, and that's expected. A prompt is a starting point: AI output varies between tools and between runs, so plan to refine spacing, timing and copy. The source pack is the preview itself, finished and running.
Can I get a refund?
Single designs are final once delivered, unless something is wrong on our side: a broken or empty download, a pack that isn't what its page describes, or a double charge. Then email support@brandmotion.in with your receipt and we fix it or refund it. The full terms are on the refunds page.
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