{"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-sem3e8z3","versions":[{"created_at":"2026-06-10T22:52:49Z","element_count":50,"note":"legacy fix: rooms設備語除去 / jpy47104992→quote16991602 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5d673971b745a118541d7b48e789a806c71e63ab0fef305f1849a7eef2cd0f48","version":10},{"created_at":"2026-06-10T16:22:44Z","element_count":53,"note":"5軸GA polish 60->87 by M5 (autonomous)","saved_by":"mcp","sha256":"8e9298ed1d662f163448415cff93568cbe05fd9369c34dd9dbe967ec88f17ae8","version":2}]}