When true, a listing that is also a child (offered under one or more parents) keeps its OWN standalone booking page, catalog entry and API eligibility, instead of existing only as a foldable add-on. Default false ⇒ being a child strips standalone existence, the historic behaviour. The hidden-package-member arm of the gate still outranks this flag.
Usage
import { type Listing } from "docs/config.ts";