{"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-p8mkgd4v","versions":[{"created_at":"2026-07-08T06:05:45Z","element_count":72,"note":"5軸GA polish 46->96 by M5 (autonomous)","saved_by":"mcp","sha256":"fee16e988f8b8b6d3ed3ddb56fc87722506b0d066c2bc53284aae22d1a264d70","version":3},{"created_at":"2026-07-08T05:55:07Z","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":"39ef7b2771551a91496fd5294d16283a02ad497aa3e9c53e7dec230c61174ba1","version":2},{"created_at":"2026-07-08T05:55:07Z","element_count":126,"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}]}