{"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-59bmr75k","versions":[{"created_at":"2026-06-10T23:01:03Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73729440→quote22740658 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"87c21a016349f893d7ad08552437e9a26c0d662680ef4f98a923abb1ff4daa31","version":9},{"created_at":"2026-06-10T22:01:01Z","element_count":83,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"3852d4c2d673e69cb4e0f5c2c13fe171862f5c2affeb2e46a46bf2dfc1b4d24e","version":3}]}