{"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-2hqlq594","versions":[{"created_at":"2026-06-10T23:23:54Z","element_count":91,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"62977dc4f1639747b0e1761ad27733e01d1efcd5d213dddd92356cd991893d90","version":10},{"created_at":"2026-06-10T23:08:34Z","element_count":50,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7ea818e5c8453d20cf7e001a26b617d82d46f12828c686945f5ffe0006921d81","version":7}]}