{"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-cpp2fkdc","versions":[{"created_at":"2026-07-03T06:03:14Z","element_count":69,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"b4f2820790e627475754ed397ead243dc0965a2a53b4ddfde468e468af846904","version":3},{"created_at":"2026-07-03T05:53:31Z","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":"a44d75c6f9a5ee01ab846ff9953a29341cb4832d1a608f334d3d093381e7e9a2","version":2},{"created_at":"2026-07-03T05:53:31Z","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}]}