{"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-x6g71fpy","versions":[{"created_at":"2026-06-10T22:57:43Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→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":"4c2e62af738da636251dde079ae8e67c46ec623946a1a04ba66a11f7a6c5ba5a","version":12},{"created_at":"2026-06-10T15:53:07Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"894782f769e7844f9b5608b9018358fa55fd4c15d668a25ba0ef6cf440085392","version":4}]}