{"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-looeharbourhouse-kthbtol6","versions":[{"created_at":"2026-08-04T18:29:58Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8b5948e22c923a81769e3668fb74411495a4eb07d525c3ffa27c23a168ee1c1c","version":2},{"created_at":"2026-08-04T18:29:58Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}