{"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-1zvtupea","versions":[{"created_at":"2026-06-10T22:57:37Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote24636447 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"22c9ad637943024ae7932db791be06992ba79b5a5eaf76945967eec8cfb84b0b","version":9},{"created_at":"2026-06-10T19:34:22Z","element_count":85,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b47224fc50ebffbc429b6bcfc88475959979dc745829ca7ea2ca85c9c4f94df0","version":2}]}