{"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-p38ck17n","versions":[{"created_at":"2026-06-16T15:22:16Z","element_count":144,"note":"言葉から生成: 総2階(箱) / 茶室と縁側のある和の住まい / 吹抜 / 縁側 / 茶室 / 深い軒 / 断熱クラスQ値0.4以下","saved_by":"mcp:create","sha256":"","version":1}]}