{"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-9hcgwifx","versions":[{"created_at":"2026-06-10T23:00:02Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21298992 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"bcdab511c82466b7bf5b452e9cbaab56c593dd1bbd07ab67fc4f5ca10b0d81fb","version":9},{"created_at":"2026-06-10T20:54:39Z","element_count":73,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"3138404408804b7bfc8215f61032ecca56e2f221183db07220d97d9531c8bd90","version":3}]}