antilagg/discord-name-checker ? reverse-engineered prompt

Build me a simple Python tool that generates random Discord usernames and checks whether they’re available.

I want it to ask me for a prefix, the username length, whether to include numbers and special characters, my residential proxy info, and an optional webhook URL for notifications. It should keep track of usernames it has already checked so it doesn’t try the same ones again, and it should save that history in a file so I don’t lose it between runs.

Make it run from the command line, work smoothly with rate limits, and be reliable when checking lots of names. If you need to look up anything current about Discord or the libraries, go ahead and check the docs online.