{"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-6h06pbmz","versions":[{"created_at":"2026-06-10T22:52:11Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20782405 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8e885579ff27ef2ea91c9e631b944c62fa0d278a19c81fa881f273bdf7199379","version":25},{"created_at":"2026-06-10T13:16:11Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.4㎡(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":"16958545b44ff36090385d755b100a5b3a75b5c0c420f6ea44ed883828430dd3","version":10},{"created_at":"2026-06-10T09:37:49Z","element_count":89,"note":"5軸GA polish 50->98 by M5 (autonomous)","saved_by":"mcp","sha256":"a00213b8c97447cc2354601fb1bbf804ca708b42fdb6c9bee0fc231c6f46682d","version":2}]}