{"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-hzlfh853","versions":[{"created_at":"2026-06-10T23:01:08Z","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":"aeff57eb1896d017ec270befb28c3ce4a2f8cff858b30d79a1ac26053aa88671","version":9},{"created_at":"2026-06-10T22:00:49Z","element_count":73,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"88c1a9b7260e773226e27c710d921f5d7e970130a79674476fbd4f8cc4651f2b","version":3}]}