← Experiences

The Builder

Prompt. Boot. Build. Vanish. The Builder plans a small app from a prompt, writes it as a self-contained HTML file, boots it inside a fresh sandbox, and exposes a live preview URL. One minute later, the sandbox is destroyed — and the URL becomes a tombstone.

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What it demonstrates

  • Software born on stage. Plan → write → boot → preview, streamed live over SSE.
  • Port preview. A server running inside the VM is exposed on the public internet at a *.preview URL the visitor can click.
  • Guaranteed teardown. The sandbox is destroyed on every path — success, failure, or timeout.
  • The tombstone. The finale invites you to revisit the URL after the kill and watch it fail. You were never there.