priors

Runs/replica

replica · pilot · Haiku 4.5 · harness

pilot-import
n = 32 · claude-haiku-4-5-20251001 · effort low · profile harness · $2.08 total
prompt improve f7b3.html

seed
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>ae683f770</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }
    body {
      width: 100vw;
      height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    svg {
      width: 400px;
      height: 400px;
    }
  </style>
</head>
<body>
  <svg id="ae683f770" viewBox="0 0 400 400">
    <circle cx="200" cy="200" r="200"/>
  </svg>
</body>
</html>

Pilot: a scripted loop, contaminated, so kept for comparison and left out of the counted trials.

What they did

feature count of share
shadow or glow 30 32 94%
animation 25 32 78%
radial gradient 23 32 72%
pulse 21 32 66%
the gradient 18 32 56%
recolored 30 32 94%
script 9 32 28%
calls Math.random or the clock 2 32 6%
same picture 2 32 6%
unchanged 2 32 6%
mentions a server 14 32 44%

median 92 lines · median $0.054 per trial · each share is good to about ±17 points at n = 32 (95%, worst case)

All 32 trials. Open one to see its source.