Abodx9/A-tunnel — reverse-engineered prompt

Build me a small Python tool called atunnel that lets me share a local development server with someone on the internet using Cloudflare Quick Tunnels.

I want it to feel really simple. If I have a site running on localhost port 8080, I should be able to run atunnel with a port option and it prints a public trycloudflare URL that I can copy and send to someone. No login, no config setup, fast startup, and it should stop cleanly when I press Ctrl+C.

Please make it work both as a command line tool and as a small Python API, so I can use a Tunnel object in a with block and read the public_url from it.

Keep the package minimal and easy to install with pip or uv. Add a clear README with install steps, usage examples, and a warning that this is only for local development and should not be used for sensitive apps or production. Look up the current Cloudflare Quick Tunnels docs if you need to.