CAUTIONS
⚠️ Skript-Packet is not a fork of TPA, syntaxes may change ⚠️
⚠️ This plugin is not for beginners ⚠️
⚠️ You may have to use java NMS wich is not an API ⚠️
⚠️ You should not used packet for the first solution if possible, do not try to use this plugin to do ScoreBoard, BossBars, Particles, or existing things ⚠️

What is a packet
The Minecraft server and your Minecraft client share information called "packets".
Example of a packet:

• Any movement made by an entity
• Opening a gui to a player
• When the player use an item

The interest of manipulation of packets is to send fake information to a specific group of players, like display a fake diamond block (client side) instead of a tnt (server side).
You can do a lot of things with packets, but it's really hard to understand how to use them ...

Requirements

• Recent version of Skript
• Stable ProtocolLib dev build (does not works with v-5.1.0)
• Java17+
• It's highly recommended to use skript-reflect
• I have only tested mc 1.19.4 and 1.20.4 but should works in a lot of mc versions

• This link can help you to identify the content of a packet: https://wiki.vg/Protocol
• This link can help you to identify the arguments of a packet: https://minidigger.github.io/MiniMappingViewer/
• The wiki is a good start : https://github.com/Anarchick/skript-packet/wiki/Examples