// substrate.lock — the pinned tier-1 descriptor this host carries.
//
// Empty on purpose. What belongs here is the closure for a one-node mesh, and that is not
// yet known: novox/hq research 012 asks what the minimum actually is, and research 011 is
// what would compute it rather than assert it.
//
// A host built with this placeholder refuses to reconcile and says why, rather than applying
// nothing and reporting success. Building a real host means building it with a real bundle.