{"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-97pgvj6h","versions":[{"created_at":"2026-06-10T22:54:26Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21673268 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"2ee92ff2ace163a632ede49b1dc24fdc034dd82f24a313bf339bd7c54c73ebe9","version":10},{"created_at":"2026-06-10T17:39:53Z","element_count":89,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"fd6c6a71bf423638cc97e2f3c6796fed840ceff4fddf962507cd41ab3656b3db","version":3}]}