{"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-x7byhox9","versions":[{"created_at":"2026-06-10T22:52:36Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c8b8c92c528a194919f3cc96172beccb589f21271ba0713267fde68caa4f347c","version":18},{"created_at":"2026-06-10T14:13:26Z","element_count":83,"note":"5軸GA polish 67->97 by M5 (autonomous)","saved_by":"mcp","sha256":"2bff5e60994ef2520e003db399a5b2dc6c8d9741ebf265a5dc60e93e5e8d09a7","version":7},{"created_at":"2026-06-10T13:47:29Z","element_count":54,"note":"backfill: 延床=居室床スラブ実面積78.3㎡(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":"011076d59b014c49ab90a63e14967642f8108c85c122a8f4ebf313d3f0b0c13a","version":4}]}