{"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-8e4na4u5","versions":[{"created_at":"2026-06-10T23:07:10Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote21000231 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"aa727e988a8f37e8773f03558339f1c80ed6924c0f332e74f5d3434bc4e67268","version":9},{"created_at":"2026-06-10T22:51:14Z","element_count":72,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"3d7c30c7763eda6e15a3bcf611e4d8bdd2d8e22ee40b168dd4acb74ff7553777","version":7}]}