{"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-22bpco6g","versions":[{"created_at":"2026-07-31T02:43:23Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"dd26a252cf24ea4c68a10d9ad5cc7694753ca50406ccfd0a3db0c63c0523af38","version":2},{"created_at":"2026-07-31T02:43:04Z","element_count":83,"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}]}