{"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-yyfrfysx","versions":[{"created_at":"2026-06-10T23:05:43Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote21425095 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"48996a4621be9888f1f4afdebb974cd421dd87f622ad96dc5d2090382c069383","version":9},{"created_at":"2026-06-10T22:17:41Z","element_count":84,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"400a916688affb2e69f8a99c01a775e4bc2ab9d508fa89e064440b76a95a0068","version":4}]}