{"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-wllkly79","versions":[{"created_at":"2026-06-10T13:19:12Z","element_count":62,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(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":"69f90d624219a87094ceec26f800e92f95e69f9c168ae122ac6bbe9383b6a596","version":10},{"created_at":"2026-06-10T10:09:31Z","element_count":91,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"953ea73d0298e84ce99c97ffbc84bccc10b4cefc745316e6dd7af65903a1b7d9","version":2}]}