{"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-willowbrookhouse-2oi4qvvj","versions":[{"created_at":"2026-06-10T22:52:17Z","element_count":85,"note":"legacy fix: jpy70091322→quote20649364 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e11db6db2f1897600f3bb674aec7eda1fac43377ba500b2818fce2a52b23f6a6","version":25},{"created_at":"2026-06-10T13:23:04Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.4㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"824d7985f1bdd0d20074f7a4c9ddc42144d58b4769be5dfb3559d329b8ba00a8","version":10},{"created_at":"2026-06-10T10:37:27Z","element_count":89,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"9ea983768a70fd1af30fbac5f6a674360e43b386b9e064d5ba91264b964c3fae","version":2}]}