{"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-oez4cpsy","versions":[{"created_at":"2026-06-10T23:00:39Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy61441200→quote24058999 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"59d38763987f04eb4dd5658e9ad304aa27d533e2f39fd273a3358a8867cda77d","version":9},{"created_at":"2026-06-10T21:44:01Z","element_count":84,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"060dd12043c56f5329f561a6b36389de5624edd71f30a5aaa32e9015945608e3","version":3}]}