{"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-5p3crd58","versions":[{"created_at":"2026-06-10T22:52:44Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20131232 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4f0419392ab484eb270dc56bd37527c10e2f5e5f0851deed8ef2b0010441fda7","version":12},{"created_at":"2026-06-10T15:36:23Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"61ed2ab95cbab98fcbe5456065bb65cc88924916ea81cd74a6f4437de815a6b9","version":4}]}