{"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-8h2sdz3i","versions":[{"created_at":"2026-06-10T22:58:32Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy54927201→quote20065976 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c9e856d2bd35e7dadbafd316bf39afbef34fc35980ce47b6fc652b61a9c941bc","version":9},{"created_at":"2026-06-10T20:07:33Z","element_count":88,"note":"5軸GA polish 56->94 by M5 (autonomous)","saved_by":"mcp","sha256":"169bcfb112dd2f7fd7dc7826c840d2e9c4301925186d31533c5f0652ddba4afa","version":2}]}