I built a Chrome extension that grades stocks with deterministic rules; here's the privacy architecture

Most stock tools want your broker login, your portfolio data, or give you opaque AI picks you can't verify. I built StockAgent , a Chrome extension that grades your watchlist using transparent, deterministic rules, and I wanted to share how I designed the privacy layer because I think the pattern is useful beyond finance apps. What StockAgent does (quick context) Each stock scores 0–5 on five…