Signal-Desktop/package.schema.json

{
  "allOf": [
    {
      "$ref": "https://json.schemastore.org/package.json"
    },
    {
      "type": "object",
      "properties": {
        "build": {
          "$ref": "./node_modules/app-builder-lib/scheme.json"
        }
      }
    }
  ]
}