tomnomnom/unfurl ? reverse-engineered prompt

Build me a small command line tool in Go that reads URLs from stdin and pulls out different parts of each URL.

I want commands for things like domains, apex domains, paths, query keys, query values, key value pairs, and a JSON view of the parsed URL. It should also support a custom format mode so I can combine pieces like scheme, domain, path, query string, fragment, and port into my own output. Add a unique option so repeated values only print once, and a verbose option that shows parse errors.

Make it feel like a simple Unix style tool that I can pipe text into, and include a helpful help screen with examples. If you need to check current Go or stdlib docs while building it, go ahead.