{"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-pj8ra47y","versions":[{"created_at":"2026-06-10T22:59:27Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63545472→quote21031370 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"3c419278a8b74b8b5ad4d847f79bf983c559c841bdacda417c18044539975e87","version":9},{"created_at":"2026-06-10T20:38:18Z","element_count":73,"note":"5軸GA polish 56->91 by M5 (autonomous)","saved_by":"mcp","sha256":"1ef27e1e1bff6349bae7c868567ccb1e70211baa3c197992ad42e5dddaa17150","version":2}]}