BizMapper/Open-Tube-SEO ? reverse-engineered prompt

Build me a Chrome extension for YouTube that works like a free, offline VidIQ alternative. I want it to analyze any YouTube video or channel and show a simple SEO score, keyword suggestions, tag ideas, and a checklist for what could be improved. It should also work inside YouTube Studio while I’m typing, so I can see the score update in real time and get help with titles, descriptions, and tags.

I’d like a popup for quick analysis, a sidebar that stays open beside YouTube, and an options page for settings and saved data. Add keyboard shortcuts and a right click menu for quick actions. If you include AI style title, tag, and description generation, keep it local in the browser and offline if possible. Make it feel polished, useful, and easy to use, with a dark theme that fits YouTube well. If you need to look up current browser extension or WebGPU docs online, go ahead.