tylertreat/comcast ? reverse-engineered prompt

Build me a small command line tool that lets me simulate bad network conditions on my machine so I can test apps under real world pain like slow connections, random packet loss, and extra latency.

I want to be able to point it at a network device, choose things like delay, bandwidth limits, and packet loss, and optionally limit the effect to certain addresses, ports, or protocols. It should work on Linux and on macOS or BSD style systems if possible, and it should also have a way to turn everything back off cleanly. A dry run mode would be really helpful so I can see the commands it plans to run before it changes anything.

Please make the experience simple, with clear help text and sensible defaults, and if you need to check current system tool behavior, look up the latest docs online.