{"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-c9qba7pn","versions":[{"created_at":"2026-06-10T22:52:42Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21473216 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9e1c9938e44e8e5efc70a8397e9a23c8334a66eab9aa5fa63ed6b5776ad0905f","version":13},{"created_at":"2026-06-10T15:19:08Z","element_count":90,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"cee183273dc18b3bce9d3466a086c9c44e6176d758f44c88aaf7129d51e5c8c2","version":5}]}