{
  "status": "failed-before-engine",
  "reason": "Cannot identify exactly one owned nested Xwayland",
  "native_session": null,
  "input_sent": false,
  "display_connected": false,
  "scope": "Hidden display wrapper preflight only; no engine compile/startup proof",
  "source_provenance": "No launch manifest persisted because no native session was created; do not reconstruct one at archive time"
}