{"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-njo2e0ai","versions":[{"created_at":"2026-06-10T22:52:38Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote19396944 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"3029a47395aa989c34cecdffe6cf36857acfa1b923404414f5631c17aa275286","version":16},{"created_at":"2026-06-10T14:45:51Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c609b87402c29031eb5f8184446b9051b89f89a1f7e4cabde0889fe33a8bbbb8","version":7}]}