{"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-3u14lrcj","versions":[{"created_at":"2026-07-17T14:13:54Z","element_count":70,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"f564cb313e977fee1eca6963c72458d2edf073218b40934be87c4537a808cd9a","version":3},{"created_at":"2026-07-17T13:58:53Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"61dee06f6759e6363ee20b5362c6921685d35107a46ad0ffc21961fb2d287706","version":2},{"created_at":"2026-07-17T13:58:53Z","element_count":105,"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}]}