{"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-nrr6ibqe","versions":[{"created_at":"2026-06-20T06:25:57Z","element_count":83,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"1ae0ca23008eda08038f74d1469589f5735af579e31a2c18265c534a751c0f86","version":3},{"created_at":"2026-06-20T06:13:14Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"08e847882695dae8655c7ee0cd2134cc7a1403b4ba01b5c9ac7b747d3057a071","version":2},{"created_at":"2026-06-20T06:13:12Z","element_count":88,"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}]}