{"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-thg6rckx","versions":[{"created_at":"2026-07-31T02:52:55Z","element_count":101,"note":"loop3: 設計時延床 50.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6b0f130387017c89fec991e4495e86cd4651b7a046b201686e9d7ac0c0b68ec2","version":2},{"created_at":"2026-07-31T02:52:46Z","element_count":101,"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}]}