{
  "architectural": {
    "description": "Standard architectural drawing layers",
    "layers": [
      {"name": "WALLS", "color": 7, "linetype": "Continuous", "description": "Wall outlines"},
      {"name": "DOORS", "color": 3, "linetype": "Continuous", "description": "Door swings and frames"},
      {"name": "WINDOWS", "color": 5, "linetype": "Continuous", "description": "Window openings"},
      {"name": "DIMENSIONS", "color": 1, "linetype": "Continuous", "description": "Dimension annotations"},
      {"name": "TEXT", "color": 2, "linetype": "Continuous", "description": "Text labels and notes"},
      {"name": "FURNITURE", "color": 8, "linetype": "Continuous", "description": "Furniture outlines"},
      {"name": "PLUMBING", "color": 4, "linetype": "Continuous", "description": "Plumbing fixtures"},
      {"name": "HVAC", "color": 6, "linetype": "Continuous", "description": "HVAC equipment and ducts"}
    ]
  },
  "mechanical": {
    "description": "Standard mechanical drawing layers",
    "layers": [
      {"name": "OUTLINE", "color": 7, "linetype": "Continuous", "description": "Part outlines"},
      {"name": "CENTERLINE", "color": 1, "linetype": "CENTER", "description": "Center lines and axes"},
      {"name": "HIDDEN", "color": 8, "linetype": "HIDDEN", "description": "Hidden edges"},
      {"name": "DIMENSIONS", "color": 5, "linetype": "Continuous", "description": "Dimensions"},
      {"name": "NOTES", "color": 2, "linetype": "Continuous", "description": "Notes and callouts"},
      {"name": "SECTION", "color": 3, "linetype": "Continuous", "description": "Section lines and hatching"},
      {"name": "DETAIL", "color": 4, "linetype": "Continuous", "description": "Detail views"}
    ]
  },
  "electrical": {
    "description": "Standard electrical drawing layers",
    "layers": [
      {"name": "POWER", "color": 1, "linetype": "Continuous", "description": "Power circuits"},
      {"name": "LIGHTING", "color": 2, "linetype": "Continuous", "description": "Lighting circuits"},
      {"name": "DATA", "color": 3, "linetype": "Continuous", "description": "Data and communication"},
      {"name": "FIRE_ALARM", "color": 4, "linetype": "Continuous", "description": "Fire alarm system"},
      {"name": "HVAC_CTRL", "color": 5, "linetype": "Continuous", "description": "HVAC controls"},
      {"name": "PANELS", "color": 7, "linetype": "Continuous", "description": "Panel boards and equipment"},
      {"name": "CONDUIT", "color": 8, "linetype": "Continuous", "description": "Conduit runs"}
    ]
  },
  "piping": {
    "description": "Standard piping/P&ID drawing layers",
    "layers": [
      {"name": "PROCESS", "color": 7, "linetype": "Continuous", "description": "Process piping"},
      {"name": "UTILITY", "color": 3, "linetype": "Continuous", "description": "Utility piping"},
      {"name": "INSTRUMENTS", "color": 1, "linetype": "Continuous", "description": "Instrumentation"},
      {"name": "EQUIPMENT", "color": 5, "linetype": "Continuous", "description": "Equipment outlines"},
      {"name": "VALVES", "color": 2, "linetype": "Continuous", "description": "Valves and fittings"},
      {"name": "LABELS", "color": 4, "linetype": "Continuous", "description": "Labels and tags"}
    ]
  }
}