This is a Mineflayer bot that connects to a local Minecraft server and responds to chat commands.

**What it does:**
1. Connects to `localhost:25565` as "ChatGPT_Bot"
2. Says "Hello world" when it spawns
3. When someone types "come" in chat, it pathfinds to that player

**Issues:**
- Missing pathfinder plugin setup - needs `bot.loadPlugin()` before using pathfinder
- Error handlers are empty (silent failures)

**Fixed version:**
```javascript
const mineflayer = require('mineflayer')
const { pathfinder, Movements, goals } = require('mineflayer-pathfinder')

const bot = mineflayer.createBot({
  host: 'localhost',
  port: 25565,
  username: 'ChatGPT_Bot'
})

bot.once('spawn', () => {
  bot.loadPlugin(pathfinder)
  bot.pathfinder.setMovements(new Movements(bot))
  bot.chat('Hello world')
})

bot.on('chat', (username, message) => {
  if (username === bot.username) return
  if (message === 'come') {
    const target = bot.players[username]?.entity
    if (target) {
      bot.pathfinder.setGoal(new goals.GoalNear(
        target.position.x,
        target.position.y,
        target.position.z,
        1
      ))
    }
  }
})

bot.on('error', (err) => console.error('Error:', err))
bot.on('kicked', (reason) => console.log('Kicked:', reason))
```