{"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-2w5w0pt0","versions":[{"created_at":"2026-06-10T22:52:24Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote21338691 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e5c98768c1a3a5e92de12f83d3c58d068d04564076dd795485ebd23401b12cd4","version":23},{"created_at":"2026-06-10T13:29:40Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積93.9㎡(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":"ff37479cc35aeb98915265a02e13322ba57cb63a4a415cd403341ca8da15cd97","version":9},{"created_at":"2026-06-10T11:43:48Z","element_count":74,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"f80896b66e9dbc5faccd1bf7cdc785b6272f41e6e93edbe3d3cec6ddd274c87e","version":4}]}