makindotcc/echo-ac-emulator — reverse-engineered prompt

Build me a small open source Go command line app that works as a Linux friendly echo.ac client, so people don’t have to install the proprietary client just because a server asks for it. I want to run it from the terminal with a pin, like go run main.go MY_PIN, and have it connect using that pin, show clear status messages, and exit cleanly if the pin is wrong or the connection fails.

Keep it simple and transparent. No desktop UI, no installer, just a user mode tool that is easy to read, build, and modify. Include a short README that explains what it is, why it exists, and the exact command to run it. If you need to check how echo.ac works or what the current behavior should be, look it up online, but keep the final project minimal and focused.