{"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-sqejcfwj","versions":[{"created_at":"2026-06-15T19:36:56Z","element_count":90,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"14ceb24067bd6fd2e85ea5ca400f125e6beb884495b69e9bf272665357a85d73","version":3},{"created_at":"2026-06-15T19:24:58Z","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":"35e96f7c949ff870faea5515ebf587c6c699de9b3c8a47f5d8a274a4d8376efe","version":2},{"created_at":"2026-06-15T19:24:57Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}