{"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-1t2agcv4","versions":[{"created_at":"2026-06-10T13:13:40Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積106.2㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"cc63041ac8a29bce4d8c13c7cb427e5dc8afe0765dbcbe7c474f8ec522d319bb","version":10},{"created_at":"2026-06-10T09:05:20Z","element_count":90,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3ba36cdcb86aa209ffcd315aa1fd56ee66dcdf74dcaf2b42bc69bae7875d902d","version":2}]}