{"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-mfbs8z36","versions":[{"created_at":"2026-06-10T22:52:13Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote24581776 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d4491b2de70a52ccf29e21813f852d21c40e730a689871f372ec17a2e0b0d34e","version":25},{"created_at":"2026-06-10T13:18:04Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(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":"4114685168fb3ad8f16bb26e402357ee86e9b332be8185215f85b8efab8572bd","version":10},{"created_at":"2026-06-10T09:53:54Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"bf3f1182fdb4d4f97eb12005840628f3d9495d202a7d99ba1a642e75e2dd65f3","version":2}]}