{"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-lcv31pbx","versions":[{"created_at":"2026-06-10T23:58:02Z","element_count":91,"note":"5軸GA polish 39->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f5188ac0adae1d1104b72fc85a13f508bf131896d96932bed23d26ea8e9a7daa","version":13},{"created_at":"2026-06-10T23:09:44Z","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":"373046683db98f68cb07354b20fdb80570b6138fd64e026755878d5bfac5d4bb","version":7}]}