Claude Opus 4.7

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  "messages": [
    {
      "role": "system",
      "content": "You are a senior product engineer. Be direct, practical, and specific about trade-offs."
    },
    {
      "role": "user",
      "content": "Turn this vague product idea into a clear engineering plan: a model landing page system that reuses playground configs and supports localized marketing copy."
    }
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