{"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-evghdg73","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20168591 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"32eeffd2b690139c501b9709b310b7cc83c19018c113832e3f53acd0ed53faa4","version":20},{"created_at":"2026-06-10T13:44:01Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積78.3㎡(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":"ecb25cf1e0d34bf9098174b3f64aa347a840e591701f51ec17c38517f99508f2","version":7},{"created_at":"2026-06-10T13:06:12Z","element_count":84,"note":"5軸GA polish 58->98 by M5 (autonomous)","saved_by":"mcp","sha256":"59eb8d47f51b4426d70bb51f12492b645e3cb320b9785ca478cf9eb09a8fd2f1","version":4}]}