{"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-xtfwqi8g","versions":[{"created_at":"2026-06-10T22:50:23Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote18790124 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"38f9808b2b2d6304444bd2d76729fd5e063bfdf3338b8a7175d7af5f988b60a9","version":25},{"created_at":"2026-06-10T13:08:50Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積74.1㎡(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":"d644fde2885decc44afb827cdaebdf59663253f1c60374de245be308adde0d1f","version":11},{"created_at":"2026-06-10T07:42:21Z","element_count":89,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"5dfad865737a6b65a9b6d655bf589d7bb756f091a2be124cde6d465867f4c46f","version":2}]}