{"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-linghamhouse-2zqu5zfg","versions":[{"created_at":"2026-06-10T22:52:16Z","element_count":77,"note":"legacy fix: jpy102533759→quote19531381 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0982a2a565d35f0668570afe7430d6a43b414689a081b58f6f3b423d7610a3cd","version":25},{"created_at":"2026-06-10T13:21:54Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.0㎡(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":"22afab92bdfc9941edbea7a460314cfa1a1bf6f3ce85556c5848180c19ac37ed","version":10},{"created_at":"2026-06-10T10:23:28Z","element_count":72,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"312baf726e7c48cac8aa6384c1224b716aac1fe6098304c1b55591db15236819","version":2}]}