> ## Documentation Index
> Fetch the complete documentation index at: https://docs.langbot.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Command

LangBot will regard messages starting with `!` as commands. Official provides [`EssentialCommands` plugin](https://space.langbot.app/market?author=langbot-team\&plugin=EssentialCommands), which includes commonly used commands.

You can also develop your own command plugin, please refer to [Command Plugin Development](/en/plugin/dev/components/command).