{"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-yurr78v7","versions":[{"created_at":"2026-06-10T22:52:40Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote20998412 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0055c4edf25943516d1f4b24943c21eccae8f57bd49f2c95e5aa85c231f5a002","version":14},{"created_at":"2026-06-10T15:03:44Z","element_count":84,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"393158b5969b2ec20793f92ff02d3bdde95f400737f417e2303b523214c3f91a","version":6}]}