google-vertex · one-shot

gemini-4-argon-low

Harness: Antigravity CLI
Version: 1.4.3
Effort: low

Rendered output

Preview is stopped. Starting it executes generated code.

Preview safety and restrictions

Restricted preview policy restricted-html-v1. A blank result is not an automatic pass or failure. Restrictions may affect the output.

Generated scripts can consume CPU or navigate their own frame. Curator review is required. Stop cannot reliably recover a blocked browser.

Curator's read

What stands out

A detailed read of this attempt's approach, distinctive choices, and lessons for future runs.

At low effort, the model emitted 0 thinking tokens (~3.3s time-to-first-token) and streamed a 1,338-line (50,658-byte) raw HTML document in a single zero-tool turn; elapsed time was 208s vs. 193s at medium effort because it generated 1,451 more HTML tokens (20,243 vs. 18,792).
Simplifies the 3-layer dual-canvas architecture used in medium and high effort to a 2-layer stack (a single background canvas for both synthwave scenery and particles behind the articulated inline SVG rig) using fixed pixel offsets rather than getBoundingClientRect() coordinate queries.
Uses velocity-and-gravity jump integration, damped Hooke's-law spring physics on the head-balanced yuzu, dual phase-offset anti-gravity SVG pulse rings, and forehead-mounted cyber-goggles that smoothly slide and rotate over the eye when Turbo mode is toggled.

Inspect the evidence

Challenge and protocol ↗

The curator reports this collected series is fully published.

Exact user instructions

User turn 1

Build an animated capybara riding a hoverboard using only HTML, CSS, and JavaScript.

Deliver a single self-contained HTML file with all CSS and JavaScript inline. Do not use external libraries, external image assets, external fonts, or network requests. Inline SVG, CSS drawing, and canvas are allowed.

The result should visibly show a capybara riding a hoverboard, with animation that makes the scene feel alive. Do not include audio.

Return only the HTML source, without explanations or Markdown code fences.

Full recorded transcript

Run provenance

Run ID: agy-0e1e32f5-ac69-45c0-a92a-97719a08fd2f-capybara-hoverboard-v1
Provider: google-vertex
Model identifier: gemini-4-argon-low
Identifier kind: unknown
Generated: 2026-10-20T10:07:29Z
Published: 2026-10-20T15:53:48Z
Generation mode: one-shot
Interface: coding-agent
Tools used: no
Challenge: capybara-hoverboard-v1
Series: agy-series-0e1e32f5-ac69-45c0-a92a-97719a08fd2f
Attempt: 1

Open recorded run metadata

Capture conditions

{
  "path": "thumbnails/agy-0e1e32f5-ac69-45c0-a92a-97719a08fd2f-capybara-hoverboard-v1.png",
  "viewport": {
    "width": 640,
    "height": 480
  },
  "capture_delay_ms": 1000,
  "browser_version": "156.0.8078.4",
  "preview_policy_version": "restricted-html-v1"
}

The curator's read above contains observations, not scores. Null capture metadata means unknown.

Original response

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Extracted HTML

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