{"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-tb47iyg2","versions":[{"created_at":"2026-06-10T22:59:50Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21000231 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"925895b8d3905a80bc877e7c5c53cced80c6166a81eebc32245aa15b0a34411a","version":9},{"created_at":"2026-06-10T20:54:38Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3ff2b0eceb17cafd392457913659afea9e2b5f515c1a8981a53f35a7be573c3e","version":3}]}