{"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-ibaa5jsd","versions":[{"created_at":"2026-06-10T22:53:46Z","element_count":62,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20576137 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f65878b7fce4a13f19dac555f6e75f53d6393d09fa7469118fb7873908af4196","version":11},{"created_at":"2026-06-10T16:08:49Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"758e607a358243cbeed26e5a39506a47f7f68ee51dd0cc302d1d538cb2685e86","version":3}]}