{"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-btcd7fu5","versions":[{"created_at":"2026-06-10T22:51:12Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20168591 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c692e2f2710898346fdf9f1ac39aacfcb237d63df9f8747397991b0acb9c7b5a","version":25},{"created_at":"2026-06-10T13:09:36Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積78.3㎡(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":"ecb25cf1e0d34bf9098174b3f64aa347a840e591701f51ec17c38517f99508f2","version":11},{"created_at":"2026-06-10T07:59:18Z","element_count":89,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"792cec306a7ce30a216d191f441b86931c4403bdcc23313abad14d7e1fb0aed6","version":2}]}