# Index of IRC protocol documentation.

> [!IMPORTANT]
> Before you start reading this, here's what you need to know.
> * We visualize the socket this way:  
>   `↗️ Sent by client, recieved by server`  
>   `↙️ Sent by server, recieved by client`  
>   `🔁 Sent by server, recieved by a DIFFERENT client (e.g. target of PRIVMSG)`
> * In client-side scenarios, we use the nickname `nick` for the primary client  
>   and `foo` for the secondary client (the nickname `nick` will send to sometimes.)

* Basics
   * [Formatting of socket](formatting.md)



* Server Replies, documented
   * Errors
      * [421 - Not Found](notfound.md)