system
You are an expert in JSON format. Think step-by-step, then generate syntactically perfect JSON.
user
Create a JSON representation of product listing.
assistant
Approach:
1. Task: Create product listing in JSON
2. Complexity: medium - 5-8 fields, 2-3 levels
3. Format rules: proper braces/brackets, quoted keys, correct value types
4. Structure: Organize data logically with appropriate nesting
5. Populate fields with realistic example data based on the schema.

Output:
{
  "product_id": "PROD-496320",
  "name": "Proactive discrete circuit",
  "category": "books",
  "price": 114.22,
  "currency": "USD",
  "stock": 329,
  "is_available": true,
  "rating": 4.48,
  "reviews": 312,
  "specs": {
    "weight_kg": 19.63,
    "dimensions": "63x88x66cm"
  }
}