{"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-r5mu68nq","versions":[{"created_at":"2026-06-10T22:53:08Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote22740658 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ffe71be4cac1045896e285568b1425773846e6e70b61e817e7f4f9f40a5cc4fa","version":10},{"created_at":"2026-06-10T16:39:39Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2064d55aa605d2cd6190ba6bcf597a9768bfdda4895070b34dcf71a0ca19895f","version":2}]}