{"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-s8itmdqi","versions":[{"created_at":"2026-06-10T22:52:40Z","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":15},{"created_at":"2026-06-10T15:02:40Z","element_count":73,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"3bda3b2df172c660a69d0154e19ea442f044e83a18246bd1e9a4f60f2f77f409","version":6}]}