{"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-98km4g39","versions":[{"created_at":"2026-06-10T23:00:32Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote21288702 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"76fa835d9037e3cca708b750bae57cc9d5c0dd5588816c499f7cbcdadd376b62","version":9},{"created_at":"2026-06-10T21:28:11Z","element_count":84,"note":"5軸GA polish 55->98 by M5 (autonomous)","saved_by":"mcp","sha256":"bfe873093272ddbae5c91b36989d8653cf69206f375a2a32a3726cf6a133f109","version":3}]}