{"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-jwzq3ljf","versions":[{"created_at":"2026-06-10T23:05:50Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy81784771→quote23180049 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"3633e09912c9c2e320c23be7cc13f1e7e3a6609571a136771f2522ae2e8d5c56","version":9},{"created_at":"2026-06-10T22:17:25Z","element_count":82,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"8e81f2f6d3dc619216e97a9df3dea3e604ca3ddb9b79e721475c6630bbc045ff","version":4}]}