{"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-whitehallparkhouse-fmfm7oby","versions":[{"created_at":"2026-06-10T22:52:16Z","element_count":77,"note":"legacy fix: jpy87379776→quote19524824 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"3c94a9059f045cc91109c00af3eb90cdc2a3f41774862838286dde6fe62b8bef","version":25},{"created_at":"2026-06-10T13:21:44Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.3㎡(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":"b3c5c0f90d34ae4124c2329ca0953a05131883d2191a362b1f592af152e22152","version":10},{"created_at":"2026-06-10T10:23:03Z","element_count":83,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f72d0f892eaac50d8c6a015de1b0e3a2c175859879046eb472228cf9b34b85c3","version":2}]}