{"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-q9tup8cn","versions":[{"created_at":"2026-06-10T22:52:39Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20857152 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"da76690399a38bb647a132460f86a481800c47c6c5b298b196c67041ee1ad699","version":15},{"created_at":"2026-06-10T14:46:07Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"61ed2ab95cbab98fcbe5456065bb65cc88924916ea81cd74a6f4437de815a6b9","version":6}]}