{"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-vhpotr2a","versions":[{"created_at":"2026-06-10T22:52:28Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20821160 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d4826f5ec02d5ed539a7cc21318da5714a768e358ef7f9c140ed1f53e8a006ea","version":20},{"created_at":"2026-06-10T12:31:45Z","element_count":72,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"9389a071bdeef42ee41b39c91beddac24e33ce13d59b412d3771a0e3cf0bc88b","version":4}]}