{"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-88zrv4cj","versions":[{"created_at":"2026-06-10T22:52:46Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21228016 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"fb2113389243c76ef248cecb893ad63d33035f1e342ca1bfca72c7fed41e4e6b","version":11},{"created_at":"2026-06-10T15:53:08Z","element_count":72,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"18d8df903fbc7479036758013a3741cbdb3fd78dcc8a46e2fb86217f15c3fb4c","version":3}]}