urbanadventurer/WhatWeb — reverse-engineered prompt

Build me a Ruby command line web scanner that I can point at a site, a list of URLs, hostnames, or IP ranges, and it should tell me what the website is running. I want it to recognize things like CMS platforms, blogs, analytics, JavaScript libraries, web servers, embedded devices, version numbers, emails, account IDs, and common error clues. Make it usable in a quick stealthy mode with just one request, but also let me turn up how thorough it gets for deeper checks.

It should handle redirects, cookies, basic auth, custom headers, proxies including Tor style proxy use, and simple hostnames should try both http and https automatically. Give me readable terminal output plus machine friendly formats like JSON, XML, and simple greppable output. Include a big plugin based detection system and make it possible to add custom checks later. Please make the help text and examples clear so I can actually use it right away, and look up current docs online if you need to.