{"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-41kc8v2j","versions":[{"created_at":"2026-06-10T22:52:31Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20303104 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6b8ae846abb97c27ef659352f895845945e42f4cfb7178b3d52c0fd9c772a926","version":20},{"created_at":"2026-06-10T13:34:46Z","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":"86e0c22dab5d3f123b683f21a1fe085a4f1558711b30dd74fc06adea7fbb4809","version":7},{"created_at":"2026-06-10T12:48:37Z","element_count":90,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4712c2b5a586ab6e76769da68894f80c66d989ce356a634cb747cf6286b984a0","version":4}]}