{"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-a51rqkr3","versions":[{"created_at":"2026-06-10T22:52:35Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20834903 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"385dba9597afd03c38922a1627e098634c71973ed559d52eca7160ca71839e4e","version":19},{"created_at":"2026-06-10T13:56:55Z","element_count":85,"note":"5軸GA polish 66->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4d52dacb7c840c23f0dfc8e905617482623f9fd26e1438de286e224566414561","version":6},{"created_at":"2026-06-10T13:46:05Z","element_count":47,"note":"backfill: 延床=居室床スラブ実面積90.0㎡(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":"21a072c4adf3a8e08e897d1ab724718c6b36a983426e6c26d31eca34808d287e","version":5}]}