{
  "status": "failed-before-engine",
  "reason": "Strict descendant binding refuses reparented Xwayland; diagnostic shared listener, prefix, nonce and process-start checks all true",
  "native_session": null,
  "input_sent": false,
  "display_connected": false,
  "scope": "Read-only descriptor and process relationship evidence only; alternate binding not yet authorized or exercised",
  "source_provenance": "No native session or persisted launch manifest"
}