myapp/node_modules/@schematics/angular/app-shell/schema.json

{
  "$schema": "http://json-schema.org/draft-07/schema",
  "$id": "SchematicsAngularAppShell",
  "title": "Angular AppShell Options Schema",
  "type": "object",
  "description": "Configures your project to generate an app-shell during build time.",
  "additionalProperties": false,
  "properties": {
    "project": {
      "type": "string",
      "description": "The name of the project where the app-shell should be generated.",
      "$default": {
        "$source": "projectName"
      }
    },
    "serverRouting": {
      "description": "Set up a server application using the Server Routing and App Engine APIs (Developer Preview).",
      "type": "boolean",
      "default": false
    }
  },
  "required": ["project"]
}