{"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-1ls1crap","versions":[{"created_at":"2026-06-10T13:34:23Z","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":7},{"created_at":"2026-06-10T12:48:38Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f6431b23cd2dd38052c4004313f88b7673f2548b9b2f5ec896255d8cb85342f7","version":4}]}