schema.json

{
  "type": "object",
  "properties": {
    "extends": {
      "type": "array",
      "items": {
        "type": "string",
        "format": "uri"
      },
      "uniqueItems": true
    },
    "defines": {
      "type": "object",
      "additionalProperties": {
        "type": "object",
        "properties": {
          "format": {
            "enum": [
              "editorconfig",
              "ignorefile",
              "json",
              "text",
              "toml",
              "yaml"
            ]
          }
        },
        "additionalProperties": false,
        "required": ["format"]
      }
    },
    "patches": {
      "type": "object",
      "additionalProperties": {
        "type": "array",
        "items": {
          "type": "object",
          "properties": {
            "value": {},
            "array_merge": {
              "enum": ["append", "append_unique", "replace"]
            },
            "priority": {
              "type": "integer"
            }
          },
          "additionalProperties": false,
          "required": ["value"]
        }
      }
    }
  },
  "additionalProperties": false
}