{"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-udl3p7ww","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19851446 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a1560fc214838149b90509711b353a7560895c2415f26285acd5baeb14f37cca","version":20},{"created_at":"2026-06-10T13:35:15Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.0㎡(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":"34ffa812e40f1c7d47cbb5c8903309668eedd3335efba4488d0bbbd0375ae337","version":7},{"created_at":"2026-06-10T13:05:22Z","element_count":73,"note":"5軸GA polish 55->97 by M5 (autonomous)","saved_by":"mcp","sha256":"32245bbbabf52357f94fba1f243c3a7fd1f370d7838d22fa2275afacfb0c0c8b","version":4}]}