{"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-ot7a48jg","versions":[{"created_at":"2026-06-10T23:06:11Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20556188 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7d6af0365a717c844346855688dd4c40b4237e258005d348652cf2eefb52a170","version":9},{"created_at":"2026-06-10T22:34:55Z","element_count":74,"note":"5軸GA polish 58->97 by M5 (autonomous)","saved_by":"mcp","sha256":"651e6c7685bd2afaac7d60ed408040dc8fa7fd1f403730b0fc1ef7717bdda66a","version":6}]}