{"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-hbrv7k3w","versions":[{"created_at":"2026-06-10T23:00:01Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20835511 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0d2eca24c5267c76622fae8242fd6de671fd2bb3bb0778f61c90f38be2604205","version":9},{"created_at":"2026-06-10T20:54:30Z","element_count":84,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"16001f30e95fd85570cff5917942bd14d46b2273dab79103bb2c6651cee43814","version":3}]}