{"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-7j919eva","versions":[{"created_at":"2026-06-10T22:52:39Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote19954947 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a51d3911c3eec979610e53303bef0aa9e7953131b94ffe4f0e40b36079b932b7","version":15},{"created_at":"2026-06-10T14:45:54Z","element_count":84,"note":"5軸GA polish 53->98 by M5 (autonomous)","saved_by":"mcp","sha256":"1ab96ca084a568fe354f93c55b26e558541349d1a743b384adcc07d381de2282","version":6}]}