google-vertex · one-shot

gemini-4-argon-medium

Harness: Antigravity CLI
Version: 1.4.3
Effort: medium

Rendered output

Preview is stopped. Starting it executes generated code.

Screenshot of gemini-4-argon-medium output

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 medium effort, the model spent only 139 thinking tokens (~6.4s) before streaming a 1,310-line (46,532-byte) raw HTML document in a single zero-tool turn, finishing in 193s (33% faster than high effort).
Retains the 3-layer hybrid architecture (background parallax canvas, articulated inline SVG rig, and foreground particle canvas) with live getBoundingClientRect() coordinate sync across three switchable themes.
Offloads periodic micro-animations (ear twitches, eye blinks, and board core pulses) to CSS keyframes with transform-box: fill-box, while JavaScript drives head pitch counter-stabilization, takeoff/landing squat compression, yuzu freefall spins, and speed-scaled Bezier scarf waves.

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-f9b90a88-d24f-4e86-9432-8299914a1541-capybara-hoverboard-v1
Provider: google-vertex
Model identifier: gemini-4-argon-medium
Identifier kind: unknown
Generated: 2026-10-20T09:46:59Z
Published: 2026-10-20T10:03:31Z
Generation mode: one-shot
Interface: coding-agent
Tools used: no
Challenge: capybara-hoverboard-v1
Series: agy-series-f9b90a88-d24f-4e86-9432-8299914a1541
Attempt: 1

Open recorded run metadata

Capture conditions

{
  "path": "thumbnails/agy-f9b90a88-d24f-4e86-9432-8299914a1541-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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