{"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-kwwh2znh","versions":[{"created_at":"2026-06-10T22:58:15Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy40475808→quote22379006 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5356af98157750cf9fd2b6e75d77bead7d9abf8fdd0fa9caf613682cb0e3749b","version":9},{"created_at":"2026-06-10T19:50:31Z","element_count":82,"note":"5軸GA polish 60->93 by M5 (autonomous)","saved_by":"mcp","sha256":"067b6f7ae3ceedbb69ba2c741e31f84555cc2f158137bb849358ac304a2af04b","version":2}]}