{
  "title": "Orbit Title Card",
  "kind": "hyperframes-style HTML composition rendered to video",
  "prompt": "Make a 6-second 1280x720 title card called ORBIT in a HyperFrames-style HTML composition. Two orbit rings expand from the centre, three coloured planets travel along them, the title fades up with its letter-spacing tightening, a brass rule draws under it, then an italic subtitle 'a hyperframes test card' fades in. Fade everything out in the last 0.7 s. Use the palette and layout from the two reference images. The timeline must be a pure function of time so it can be rendered frame by frame.",
  "model": "claude-opus-5-5",
  "generator": "Claude Code (Anthropic)",
  "created": "2026-10-20",
  "references": ["ref-01-palette.png", "ref-02-layout-sketch.png"],
  "code": ["composition.html", "render.mjs"],
  "render": {
    "renderer": "Playwright Chromium 1208 headless, window.__seek(t) per frame",
    "encoder": "ffmpeg (ffmpeg-static 5.3.0), libx264, yuv420p, crf 20",
    "fps": 30,
    "frames": 180,
    "duration_s": 6,
    "width": 1280,
    "height": 720
  },
  "outputs": ["orbit-title-card.mp4", "poster-frame.png"]
}