{"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-cdu16hr1","versions":[{"created_at":"2026-06-10T23:58:01Z","element_count":74,"note":"5軸GA polish 50->97 by M5 (autonomous)","saved_by":"mcp","sha256":"6b6f3b99842bd6171484a9f1364e7f6dde76d36c8d52b72d213c9c672a1b72fa","version":13},{"created_at":"2026-06-10T23:09:37Z","element_count":47,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"cb6f310e9c6de206921162169a54e3e2f822bf1eb1385495b73935f097d50534","version":7}]}