{"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-qz0ccy06","versions":[{"created_at":"2026-06-10T22:52:01Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21201288 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5ce4fe80761bdfd08e04b45cd97970654900a513cc083655a190918098bea223","version":26},{"created_at":"2026-06-10T13:10:30Z","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":"6fc94c4c02e0d9c515c2ebbc7b9636feaa0f9536ccbbadb1394bb4a1b384d086","version":11},{"created_at":"2026-06-10T08:15:23Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"df50209fb447878aff5f64499106d3c72301623af53131754c8048c031b22896","version":2}]}