{"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-morrisviewhouse-m88b50m0","versions":[{"created_at":"2026-06-10T13:19:43Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(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":"49d31939f6559776e517590610b85dd579b032a88d2d350993061212397719fd","version":10},{"created_at":"2026-06-10T10:09:44Z","element_count":68,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"19c1ab6e345b010277f2914fdaf69fdd9747c340e360a2c0ce7df1407bf1d884","version":2}]}