{"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-9n8gxkkf","versions":[{"created_at":"2026-06-10T22:52:03Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21039553 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c5f6e7e6252d515f0bbaee73f8f20fdbad8628c1dfc68231b8cf82aace4f3d48","version":26},{"created_at":"2026-06-10T13:11:53Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.7㎡(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":"36e68d6f412e75e3535e685c12350bd3c4996437f0fb0bacecb612b8c4ef8856","version":11},{"created_at":"2026-06-10T08:32:23Z","element_count":90,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"bd87231aa5cca341b48a3dd8dd75b1197926b52f4278d4adefcffeb3204c7568","version":3}]}