{"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-9iqcxfkz","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21475211 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"964ae15a805a61af5fbd10b8ea1250e9e05abec3e2d0cd0f68b1005796958a13","version":20},{"created_at":"2026-06-10T13:44:04Z","element_count":65,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(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":"1fd34bfe791f83637b2e5004ff5538446097c3ae711ad0227ea422314d8297e4","version":7},{"created_at":"2026-06-10T13:06:02Z","element_count":84,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"0506530a9229f3fb84204a91b991667388062c6f724591b3408680fa6da48a25","version":4}]}