{"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-t73ef8ot","versions":[{"created_at":"2026-06-10T23:06:30Z","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":9},{"created_at":"2026-06-10T22:34:53Z","element_count":72,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"e45ef991a9524846a3514ec0ffbf518d462823c78071bcc60219e21d94003949","version":6}]}