atom/spec/fixtures/packages/package-with-json-config-schema/package.json

{
  "name": "package-with-json-config-schema",
  "configSchema": {
    "a": {
      "type": "number",
      "default": 5
    },
    "b": {
      "type": "string",
      "default": "five"
    }
  }
}