nityansuman/warren — reverse-engineered prompt

Build me a simple web app called Warren that predicts the next closing stock price for US company stocks. A user should be able to enter a stock ticker like MSFT, GOOGL, or FB, submit it, and see a real time forecast based on recent market data.

Use Python and make it runnable locally from a single server file. The prediction should use Facebook Prophet or the current maintained Prophet package, with a multivariate single step time series forecasting approach if possible. Pull stock data from Yahoo Finance or another free source.

Please include a clean homepage, a form for the ticker symbol, a results page with the predicted closing price, and a simple chart showing recent prices and the forecast. Keep the interface beginner friendly and don’t make it look like a trading terminal.

Also include setup instructions, requirements, and a clear note that this is only an educational prediction tool, not financial advice. Look up current docs online if you need to.