Add optional startup announcement feature

Bot can now send a one-time announcement to all configured channels when it starts.

Configuration:
- Set STARTUP_ANNOUNCEMENT in .env with your message
- Leave empty to disable announcements
- Prevents duplicate announcements on reconnects

Usage example:
STARTUP_ANNOUNCEMENT=Bot updated! New features: colored prices and charts

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

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

.env.example

@@ -1,6 +1,7 @@
 # Discord Configuration
 DISCORD_TOKEN=your_discord_bot_token_here
 CHANNEL_ID=your_channel_id_here,optional_second_channel_id
+STARTUP_ANNOUNCEMENT=
 
 # Bot Configuration
 COMMAND_PREFIX=!

README.md

@@ -160,6 +160,7 @@ Environment variables in `.env`:
 |----------|-------------|---------|
 | `DISCORD_TOKEN` | Your Discord bot token | Required |
 | `CHANNEL_ID` | Discord channel ID(s) for updates (comma-separated for multiple) | Required |
+| `STARTUP_ANNOUNCEMENT` | Optional message to send when bot starts (empty = no announcement) | `""` |
 | `COMMAND_PREFIX` | Command prefix for bot | `!` |
 | `PRIMARY_TICKER` | Stock ticker for hourly updates | `PYPL` |
 | `UPDATE_INTERVAL_HOURS` | Hours between updates | `1` |
@@ -169,6 +170,11 @@ Environment variables in `.env`:
 CHANNEL_ID=1442203998932304035,9876543210123456789
 ```
 
+**Startup Announcements:** Send a one-time message when the bot starts (useful for announcing updates):
+```
+STARTUP_ANNOUNCEMENT=Bot updated with new features: colored price changes and FinViz charts!
+```
+
 ## Switching Stock API Providers
 
 The bot is designed with an abstract API layer. To switch providers:

bot.py

@@ -38,6 +38,7 @@ class StockBot(commands.Bot):
         self.scheduler = AsyncIOScheduler(timezone=pytz.timezone('America/New_York'))
         self.target_channel_ids = [int(id) for id in Config.CHANNEL_IDS]
         self.primary_ticker = Config.PRIMARY_TICKER
+        self.startup_announced = False
 
     async def setup_hook(self):
         """Initialize the bot and set up scheduled tasks."""
@@ -77,6 +78,11 @@ class StockBot(commands.Bot):
             else:
                 logger.error(f'Could not find channel with ID {channel_id}')
 
+        # Send startup announcement if configured and not already sent
+        if Config.STARTUP_ANNOUNCEMENT and not self.startup_announced:
+            await self.send_startup_announcement()
+            self.startup_announced = True
+
     async def send_hourly_update(self):
         """Send hourly stock price update if market is open."""
         if not MarketHours.is_market_open():
@@ -97,6 +103,23 @@ class StockBot(commands.Bot):
         for channel_id in self.target_channel_ids:
             await self.send_stock_update(self.primary_ticker, channel_id)
 
+    async def send_startup_announcement(self):
+        """Send startup announcement to configured channels."""
+        embed = discord.Embed(
+            title="🤖 Bot Update",
+            description=Config.STARTUP_ANNOUNCEMENT,
+            color=discord.Color.blue(),
+            timestamp=datetime.now(pytz.timezone('America/New_York'))
+        )
+
+        for channel_id in self.target_channel_ids:
+            channel = self.get_channel(channel_id)
+            if channel:
+                await channel.send(embed=embed)
+                logger.info(f"Sent startup announcement to channel {channel_id}")
+            else:
+                logger.error(f"Could not send announcement to channel {channel_id}")
+
     async def send_stock_update(self, ticker: str, channel_id: int):
         """
         Fetch stock data and send formatted embed to specified channel.

config.py

@@ -12,6 +12,7 @@ class Config:
     CHANNEL_ID = os.getenv('CHANNEL_ID')
     CHANNEL_IDS = [id.strip() for id in os.getenv('CHANNEL_ID', '').split(',') if id.strip()]
     COMMAND_PREFIX = os.getenv('COMMAND_PREFIX', '!')
+    STARTUP_ANNOUNCEMENT = os.getenv('STARTUP_ANNOUNCEMENT', '')
 
     # Stock configuration
     PRIMARY_TICKER = os.getenv('PRIMARY_TICKER', 'PYPL')