{"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-th2k6c53","versions":[{"created_at":"2026-06-10T23:23:55Z","element_count":84,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"5e2fbc6ecd6743f42c5d055fe98b76368c7a81d9f42165caaafea695c35c3717","version":10},{"created_at":"2026-06-10T23:08:18Z","element_count":44,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a4246ae58f1de28ba326b56e915bd9e8db1212a85e0ce7201461056baad2bf58","version":7}]}