{"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-fz57wde8","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20764725 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1166611260df48c2932f1fb7e7e683cfd474795e2a552bc5542246846473bad7","version":12},{"created_at":"2026-06-10T15:37:15Z","element_count":74,"note":"5軸GA polish 56->97 by M5 (autonomous)","saved_by":"mcp","sha256":"7f04559da8e0b298e53b73cbedbf8c222362b1959afe08f2c63d54ee17aba5ac","version":4}]}