{"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-willowbrookhouse-kltk1cz0","versions":[{"created_at":"2026-06-10T22:52:18Z","element_count":77,"note":"legacy fix: jpy81611913→quote22697879 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"693710a77d6081bed3810d5f61a44037f49b379619581acc12f7360415b188be","version":25},{"created_at":"2026-06-10T13:23:31Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積97.8㎡(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":"1021aed4b61463fa707c8b45b93ce8cc913d2a35615ea53c82e64faab43717a8","version":10},{"created_at":"2026-06-10T10:37:47Z","element_count":84,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"9b784a7205a3444436b90d1f2976d9d3f00f6c87b91b01f6ccc544db9237bf8b","version":2}]}