{"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-f3uuknpw","versions":[{"created_at":"2026-06-10T23:00:41Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21093533 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8c90121ce886808c1fbb1d941d6c36904bad4bb4597f269238ad26819ce5ebdd","version":9},{"created_at":"2026-06-10T21:44:04Z","element_count":91,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"61778613027b25a234498f41b6548d9918afebd05f66fb14bd1d3b26f2c9a764","version":3}]}