krishpranav/Backdoorcreator ? reverse-engineered prompt

Build me a small Python tool for my own lab that sets up a simple listener and a test client so I can verify incoming connections on Linux, Mac, and Termux.

I want it to be easy to run from the command line, install any needed dependencies, and work from two scripts, one for the server side and one for the client side. Keep the interface simple and make sure it shows when a connection comes in and lets me test the basic communication flow.

Please make it polished enough that I can run it right away, and if you need to check current Python docs or networking behavior online, go ahead.