{"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-08xse8uo","versions":[{"created_at":"2026-06-13T15:15:53Z","element_count":69,"note":"5軸GA polish 42->92 by M5 (autonomous)","saved_by":"mcp","sha256":"d4276078b61bd7dfea92f5f9808377096c98293d0226123b380b84afebf05045","version":3},{"created_at":"2026-06-13T14:59:08Z","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":"14e72f469326a420adf4c066fbaf5da027fd83b24b718e47e054a5b618174a47","version":2},{"created_at":"2026-06-13T14:59:03Z","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}]}