{"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-5rvsrgxd","versions":[{"created_at":"2026-07-02T07:53:11Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"426ac26744eb867e21921267b8b49a2561b3dcc135ab28ba5c40b32b7ddff4a6","version":3},{"created_at":"2026-07-02T07:43:29Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"814630cc968a256f4e806ea01a035817e0694e7292ae17350ed8df34d2b2eeea","version":2},{"created_at":"2026-07-02T07:43:29Z","element_count":86,"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}]}