{"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-6p4stk1a","versions":[{"created_at":"2026-06-10T23:00:37Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote21141931 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"26250f10efca86379c6a16d4acab76e993bd84ce6080d78d5fc4d1ef3c39dba0","version":9},{"created_at":"2026-06-10T21:28:12Z","element_count":85,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b4c188b71667056259e0d3196fd09323812e4d18b53555944bc3f1627af09429","version":3}]}