{"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-em1kugac","versions":[{"created_at":"2026-06-10T13:11:57Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積93.9㎡(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":"9c218a7a923fbcdda8ff1baa63b3ab11dcf40cb065fde4c8497f1d5c1bb608a4","version":11},{"created_at":"2026-06-10T08:32:40Z","element_count":89,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"556439df7943ba44af6f2f8302bf0c65437f35eb4be56f4426f9040e0728d646","version":3}]}