{"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-fx0iwblz","versions":[{"created_at":"2026-06-10T22:52:23Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote19841009 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"69f27a7e272d6968d96f280653a807105410a1a3bf0eaf811e460538bb879875","version":23},{"created_at":"2026-06-10T13:29:19Z","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":"6c21ddd163d179c20d15f8feb9f4d9decd06fbd1fb73ba078212aa8519a3ab46","version":9},{"created_at":"2026-06-10T11:43:29Z","element_count":90,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"cee183273dc18b3bce9d3466a086c9c44e6176d758f44c88aaf7129d51e5c8c2","version":4}]}