{"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-c7dyfndb","versions":[{"created_at":"2026-06-10T22:59:25Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy50261601→quote22685733 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1a936826e50b6c49fbfd55f85c260814f97d04a887718388b8dd26ac770511b0","version":9},{"created_at":"2026-06-10T20:38:24Z","element_count":89,"note":"5軸GA polish 56->92 by M5 (autonomous)","saved_by":"mcp","sha256":"00acb813e1ea5f52c9feb7ab446e2dc238d4b9544b3eee5bc916b0d15e063962","version":2}]}