{"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-g9i3t31g","versions":[{"created_at":"2026-06-10T22:52:37Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19293329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"befbc617981ff433396cee5fe52fbbd48a790bde6439f167010887405b457d32","version":17},{"created_at":"2026-06-10T14:29:30Z","element_count":73,"note":"5軸GA polish 50->97 by M5 (autonomous)","saved_by":"mcp","sha256":"715c90b855b7b1d33f0abfdff5d4bd09e64482a6ed385016061f45e273052baa","version":7}]}