{"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-lu1wjfnd","versions":[{"created_at":"2026-07-02T19:42:33Z","element_count":73,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"b8f606f77df21998d70241d9db190ea8bdf933a3441c821c6d9133042639aa4b","version":3},{"created_at":"2026-07-02T19:39:25Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"099c664184bb8bc83175b04ce1209c95d9158f4bf57bdb003a6dc9a9608be870","version":2},{"created_at":"2026-07-02T19:39:25Z","element_count":88,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}