{"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-zmc45jmf","versions":[{"created_at":"2026-06-10T22:52:35Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"24b7aa81909a2a129473ee0246f428c87c562173ca869145b4ac0f64a7159302","version":18},{"created_at":"2026-06-10T14:12:45Z","element_count":89,"note":"5軸GA polish 66->98 by M5 (autonomous)","saved_by":"mcp","sha256":"fc9db6f9081f606c46b60c921622caa6250eadb8d54260521be502833001e0d8","version":7},{"created_at":"2026-06-10T13:46:52Z","element_count":54,"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":"29b4f2f2a3e21f436a19e5900002e9ddf83d51a5460edccb1cc6d7f18a2675de","version":4}]}