{"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-2x4-gpp7xthu","versions":[{"created_at":"2026-06-07T15:05:38Z","element_count":91,"note":"fork元 u-house-ax740jrt / 2x4 枠組壁版 / 延床143㎡ 本体工事¥37058113 (現実単価26万/㎡) / 土地出典 https://suumo.jp/tochi/hokkaido_/sc_sapporoshikita/nc_20553213/ 990万円","saved_by":"editor","sha256":"b5fa8fe6eda897736a8d2e1686ab19359676abfe7ab979712c8593de10b4184f","version":2}]}