GPT5 API 中默认不使用 markdown 格式化，官方建议居然是手动更新 prompts1：
1- Use Markdown **only where semantically correct** (e.g., `inline code`, ```code fences```, lists, tables).
2- When using markdown in assistant messages, use backticks to format file, directory, function, and class names. Use \( and \) for inline math, \[ and \] for block math.
1❯ nix flake update
2 3❯ sudo nixos-rebuild switch
4building the system configuration...
5activating the configuration...
6setting up /etc...
7reloading user units for davinci42...
8restarting sysinit-reactivation.target
9the following new units were started: NetworkManager-dispatcher.service
10Done. The new configuration is /nix/store/mp17nhbadmffs9ah961ldj0y1l38a73m-nixos-system-azure-25.05.20250424.f771eb4