{"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-nhzltfkv","versions":[{"created_at":"2026-06-10T22:52:31Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy81784771→quote21021361 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"00688bfeeabf8353214fdb02db5d311c5e8ef023ce680bbed7792537f7e44d99","version":20},{"created_at":"2026-06-10T13:34:24Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積87.5㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"95a1e2c84e50b5990ad519a19fb2b95cbc3ce04325da63e92b01ffe26a830e73","version":7},{"created_at":"2026-06-10T12:48:13Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3e123036b4d3088a011537acd363a27671576363d6852b692aba53510331ae12","version":4}]}