{"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-ln6uujkr","versions":[{"created_at":"2026-06-10T22:52:33Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→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":"db4cf7e1e5865e1e01807fa4cde7c0569b44f7be52dda2d228e3428d78bdb0bd","version":20},{"created_at":"2026-06-10T13:44:28Z","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":"2026-06-10T13:21:45Z","element_count":72,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"3d7c30c7763eda6e15a3bcf611e4d8bdd2d8e22ee40b168dd4acb74ff7553777","version":4}]}