{"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-rh7e8ia8","versions":[{"created_at":"2026-06-10T22:54:30Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy80278800→quote22834440 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"72b57a17f60659c3f4ce2cda39d627311a70b717f8a19baf8ac5f36727fe412f","version":10},{"created_at":"2026-06-10T17:40:01Z","element_count":71,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"0afcf6dc9188933639e90d591eca8358265de35075b0525f2234496d989242e6","version":3}]}