{"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-2qu0qj06","versions":[{"created_at":"2026-06-13T20:14:54Z","element_count":69,"note":"5軸GA polish 38->91 by M5 (autonomous)","saved_by":"mcp","sha256":"4eefdb5577bb9f7f1ddeca4ddc077144f817148ac6bf33cfcc5b72317bdac011","version":3},{"created_at":"2026-06-13T20:08:35Z","element_count":101,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fe7eaa6a725cd180f115c6b38858e6366e09ea1befea625be446ff5972a3cfe6","version":2},{"created_at":"2026-06-13T20:08:35Z","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}]}