{"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-g6rsgrgl","versions":[{"created_at":"2026-06-10T22:59:59Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote19805192 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7c873b289360449ffdac8b647b0ae2fec14b44c3b124c1542e65da601c0c4101","version":9},{"created_at":"2026-06-10T20:54:43Z","element_count":74,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"5a42920aac97ecfa4073093ebfae900ad5926660ddc33c73c5565f1691f9adba","version":3}]}