{"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-v0rta6tm","versions":[{"created_at":"2026-06-10T23:00:18Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20833288 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ef6c6aba8530be408e9804ea1eff9aee3e160adc67e83b4d131c995ea12bd0ac","version":9},{"created_at":"2026-06-10T21:10:54Z","element_count":85,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b47224fc50ebffbc429b6bcfc88475959979dc745829ca7ea2ca85c9c4f94df0","version":3}]}