{"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-sgmhi0pc","versions":[{"created_at":"2026-06-10T22:55:06Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63326340→quote24371566 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a8c5b4070474bba6ba3e265ece90ad8f987c35b21cab41bc316b8c88ae4a99d4","version":10},{"created_at":"2026-06-10T17:56:12Z","element_count":89,"note":"5軸GA polish 56->97 by M5 (autonomous)","saved_by":"mcp","sha256":"a9335ab71b6407a57131a50459dcf7a6185940d5cccaded43b527fb233dc5cfe","version":3}]}