{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Velxio Diagram",
  "description": "Circuit diagram layout (Wokwi-compatible format)",
  "type": "object",
  "required": ["version", "parts", "connections"],
  "properties": {
    "version": {
      "type": "integer",
      "const": 1
    },
    "author": { "type": "string" },
    "editor": { "type": "string" },
    "parts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id", "type", "left", "top"],
        "properties": {
          "id": { "type": "string" },
          "type": { "type": "string" },
          "left": { "type": "number" },
          "top": { "type": "number" },
          "rotate": { "type": "number" },
          "hide": { "type": "boolean" },
          "attrs": {
            "type": "object",
            "additionalProperties": { "type": "string" }
          }
        }
      }
    },
    "connections": {
      "type": "array",
      "items": {
        "type": "array",
        "minItems": 3,
        "maxItems": 4,
        "items": [
          { "type": "string", "description": "Source pin (componentId:pinName)" },
          { "type": "string", "description": "Target pin (componentId:pinName)" },
          { "type": "string", "description": "Wire color" },
          {
            "type": "array",
            "items": { "type": "string" },
            "description": "Routing hints"
          }
        ]
      }
    },
    "serialMonitor": {
      "type": "object",
      "properties": {
        "display": { "type": "string", "enum": ["terminal", "plotter"] },
        "newline": { "type": "string", "enum": ["lf", "cr", "crlf"] }
      }
    }
  }
}