DEFCON-Web/Longtail-Keyword-Research-WP-Plugin — reverse-engineered prompt

Build me a WordPress plugin for longtail keyword research. I want to install it from a zip in the WordPress admin like a normal plugin, then open a simple dashboard page where I can type a seed keyword and get suggested longtail keyword ideas.

The results should help me find low competition keywords that still have search volume, so show the keyword phrase plus useful numbers if available, like search volume, competition level, and maybe a simple score that makes it obvious which ones are worth targeting. Keep the interface clean and beginner friendly, because this is for people doing SEO who don’t want a complicated tool.

Please include the normal plugin setup files, make it safe for WordPress admin use, and package it so I can upload it through Plugins, Add Plugin, Upload Plugin. If live keyword data needs an outside service, add a clear settings page for an API key and use placeholders or demo data when no key is set.