{"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-hyzmjmrz","versions":[{"created_at":"2026-07-19T05:52:27Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"1ffdca4628fac3e959a4912a37a73776992cc410ff3a9c2ab85e3db8f7aa760f","version":3},{"created_at":"2026-07-19T05:48:05Z","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":"1d70582e9fefde431d2fabbc0ad228c9e49721898c1bba8ba35b161662e56f1f","version":2},{"created_at":"2026-07-19T05:48:05Z","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}]}