{"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-hm5ui819","versions":[{"created_at":"2026-06-13T16:56:11Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3542adce1bc44bfdb98a798bcba29188edc6db1f109a8fd1e247c977c5261938","version":3},{"created_at":"2026-06-13T16:40:18Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4dadfd1b4223d7008e3693a4b91c5f75d1e6401e97225f7e5159fc33ad9a0394","version":2},{"created_at":"2026-06-13T16:40:18Z","element_count":130,"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}]}