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  <!-- Lighthouse base pier -->
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  <!-- Lighthouse tower -->
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  <!-- Stripes -->
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  <!-- Gallery deck -->
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  <!-- Lantern room -->
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  <!-- Roof -->
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  <circle cx="400" cy="141" r="3" fill="#2b261f"/>

  <!-- Door -->
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  "model": "anthropic/claude-sonnet-5",
  "system": "Respond with a single complete <svg> element and nothing else. No markdown fences, no explanation. Include an explicit viewBox. Do not reference external fonts, images, or stylesheets — the SVG must be fully self-contained.",
  "messages": [
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      "role": "user",
      "content": "«REDACTED — 58 words, 338 chars»"
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