{"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-nf5oodjf","versions":[{"created_at":"2026-07-22T02:05:39Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"114e028fd45ba1f6602a02e1529d152d5697265a51e0647c659fcdc355377e20","version":2},{"created_at":"2026-07-22T02:05:39Z","element_count":126,"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}]}