text: """Reminds you to cool it."""
  import re
  
  def on_message(msg, context):
      """Context has keys: 'client', 'config', 'hooks'"""
      text = msg.get("text", "")
  
      if len(text) <= 5:
          return None
      text = re.sub(r'<@.+?>','',text) # Slack user IDs look like shouting...
      if len(text) > 4 and text.isupper():
          return "You don't have to shout."