{"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-thz159nc","versions":[{"created_at":"2026-06-10T23:00:48Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21288702 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6aea7114c7067dd85c5574f8f603143701e6cc0cf3d0ce72dc3c3e430d805241","version":9},{"created_at":"2026-06-10T21:44:03Z","element_count":71,"note":"5軸GA polish 58->97 by M5 (autonomous)","saved_by":"mcp","sha256":"518d9fef9842a55887debdd3ad2ddbe24c512a0e75efbda046dbcb92a1625e5c","version":3}]}