{"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-bz3eujdp","versions":[{"created_at":"2026-06-10T22:56:56Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote19615588 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"841f676d6979e0014d3771cb159a8932a72998339e8073289f363da8a2d1aa0b","version":10},{"created_at":"2026-06-10T19:02:38Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c34ded7d9deab8260befc0008729b31c464a03a92d5f155efa37800143bf6842","version":3}]}