{"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-medrwzhy","versions":[{"created_at":"2026-06-10T23:00:01Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy61441200→quote24636447 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"966c522c0b32fdc2a14f3f8899e40eee6a986137e1882c4da864ed17218a02ec","version":9},{"created_at":"2026-06-10T20:54:35Z","element_count":84,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"6d7269d0512725a286c7fd538072ed8e2efd799b2d76c7959a3293b6712cf564","version":3}]}