{"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-e2yfgbnm","versions":[{"created_at":"2026-06-10T22:56:47Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20835511 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9d2a9e0748bf6b009032727ad7e434ee7d9154e038e56b490cce305b12c9a6e1","version":10},{"created_at":"2026-06-10T19:02:38Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3506f96534e714a82c5f3e59e2b1559964a1ee2fa6cf9414a2bcdcd67e2d1610","version":3}]}