{"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-75dupahr","versions":[{"created_at":"2026-06-10T13:10:41Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積78.3㎡(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":"28d69fe6ea73689d2523a349843f3a1b32867303bf5a19b1c0807d376572651a","version":11},{"created_at":"2026-06-10T08:15:16Z","element_count":91,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"249ea9173a47bd1b84d415ef686c672620fbded9f5fff2159e606f34a34c38a7","version":2}]}