{"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-p0b3jycj","versions":[{"created_at":"2026-06-10T23:08:39Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21000231 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"be188fce0e1019c063d5fae5c0d78a6908a742006eb74da74213180fd741841a","version":9},{"created_at":"2026-06-10T22:16:59Z","element_count":84,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"0506530a9229f3fb84204a91b991667388062c6f724591b3408680fa6da48a25","version":4}]}