Initial commit: Discord stock bot with hourly PYPL updates

Functional Discord bot with automated hourly stock price updates during NYSE trading hours. Supports manual queries for any ticker via prefix commands.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

stock_api/yahoo.py

@@ -0,0 +1,75 @@
+import yfinance as yf
+import logging
+from typing import Optional, Dict, Any
+from .base import StockAPIBase
+
+
+logger = logging.getLogger(__name__)
+
+
+class YahooFinanceAPI(StockAPIBase):
+    """Yahoo Finance implementation of stock price provider."""
+
+    def get_stock_price(self, ticker: str) -> Optional[Dict[str, Any]]:
+        """
+        Retrieve stock price data from Yahoo Finance.
+
+        Args:
+            ticker: Stock ticker symbol
+
+        Returns:
+            Dictionary with stock data or None if unavailable
+        """
+        try:
+            stock = yf.Ticker(ticker)
+
+            # Use history() method instead of info to avoid rate limiting
+            # Get last 2 days of data to calculate change
+            hist = stock.history(period="2d")
+
+            if hist.empty or len(hist) < 1:
+                logger.warning(f"No historical data available for ticker: {ticker}")
+                return None
+
+            # Get most recent price data
+            current_price = float(hist['Close'].iloc[-1])
+
+            # Get previous close (either from previous day or use current data)
+            if len(hist) >= 2:
+                previous_close = float(hist['Close'].iloc[-2])
+            else:
+                previous_close = float(hist['Open'].iloc[-1])
+
+            change_dollar = current_price - previous_close
+            change_percent = (change_dollar / previous_close) * 100
+
+            # Market is considered open if we have today's data
+            market_open = True  # Simplified - actual market status requires additional API call
+
+            return {
+                'ticker': ticker.upper(),
+                'current_price': round(current_price, 2),
+                'previous_close': round(previous_close, 2),
+                'change_dollar': round(change_dollar, 2),
+                'change_percent': round(change_percent, 2),
+                'market_open': market_open
+            }
+
+        except Exception as e:
+            logger.error(f"Error fetching data for {ticker}: {e}")
+            return None
+
+    def is_available(self) -> bool:
+        """
+        Check if Yahoo Finance API is accessible.
+
+        Returns:
+            True if accessible, False otherwise
+        """
+        try:
+            test_stock = yf.Ticker("AAPL")
+            info = test_stock.info
+            return info is not None and len(info) > 0
+        except Exception as e:
+            logger.error(f"Yahoo Finance API unavailable: {e}")
+            return False