{"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-crookstonhouse-qo59ym7q","versions":[{"created_at":"2026-06-10T13:22:07Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積92.5㎡(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":"7c01220652869f6e2bde9f1ccc88cb06e904606c94111f2334c1991198061287","version":10},{"created_at":"2026-06-10T10:23:05Z","element_count":90,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"58ca0a915f67cd6417e6efdc9e78f289f131ac01063212e2acdedda51ba9e31e","version":2}]}