{"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-6qprwahl","versions":[{"created_at":"2026-06-10T23:00:49Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20954809 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8ff76141d0ee67c8ee8fc6211e3ead0467563fe903b99385cfa6b300038a67c6","version":9},{"created_at":"2026-06-10T21:44:03Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"55125bab84f698cd9a00e785491ff43cb90bb6f56a5071d5b0ef97255c0ec459","version":3}]}