{"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-fbpkewf3","versions":[{"created_at":"2026-06-10T23:07:01Z","element_count":74,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote27208663 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9af952b2bfbdbb68ebd6de2b4f857c9e2277e0a1dbba479e84a484d898f4f172","version":9},{"created_at":"2026-06-10T22:52:02Z","element_count":74,"note":"5軸GA polish 56->97 by M5 (autonomous)","saved_by":"mcp","sha256":"7f04559da8e0b298e53b73cbedbf8c222362b1959afe08f2c63d54ee17aba5ac","version":8}]}