{"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-6dc6ssf7","versions":[{"created_at":"2026-06-10T22:57:04Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19504363 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"2384f4f2999194c56c19a911be984ebbd75978791e572b0b06a62fb0dee98d5b","version":9},{"created_at":"2026-06-10T19:02:33Z","element_count":74,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d9ad9f99b991cb61c545929e45f493a9552289e6b0d4b467bac3fbdc6c67ce12","version":2}]}