{"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-q34cp21m","versions":[{"created_at":"2026-06-10T23:00:27Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→quote21306726 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"47c7502ab84fa821cc099dd26e7a3998723addf64d4b6a72e3082795b16335a2","version":9},{"created_at":"2026-06-10T21:28:24Z","element_count":89,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"167dae1fd156c65f7598cb62e64b552ab71d5ba45ce61cb459b00f6f17bd1061","version":3}]}