{"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-l24xmm2r","versions":[{"created_at":"2026-06-10T23:00:26Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20180810 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6c245f0ea3a1473a46b43d8de8e8d8dcbf54f1940b66f8b45b0acc2fec7a8a86","version":9},{"created_at":"2026-06-10T21:28:00Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"df50209fb447878aff5f64499106d3c72301623af53131754c8048c031b22896","version":3}]}