{
  "status": "failed-before-engine",
  "reason": "Nested Xwayland is reparented and strict Gamescope descendant binding remains unverified",
  "native_session": null,
  "input_sent": false,
  "display_connected": false,
  "scope": "Sanitized private-display preflight diagnostics only",
  "source_provenance": "No native session or persisted launch manifest"
}