{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-a8zv5dcw","versions":[{"created_at":"2026-06-16T12:13:21Z","element_count":128,"note":"言葉から生成: 総2階(箱) / 茶室と縁側のある和の住まい / 2階吹抜け茶室 / 多角形縁側 / 中庭 / 庇 / 高気密・高断熱 / 和纸スクリーン","saved_by":"mcp:create","sha256":"","version":1}]}