Helios

Plugin API/Tweaks collection on top of an Orion Mixin loader & Paper Minecraft server software

Features

Various item tweaks:
- Exposed canPlaceOn and canDestroy NBT tags
Player tweaks:
- Built-in AFK events
- Can disable player data saving - extremely useful for most lobby servers
- Disable idle timeout kicking for opped players (Vanilla does not have that feature built-in for some reason!)
World system tweaks:
- More precise spawnpoint without plugins! Decimals and yaw/pitch are saved to world directly now¹
- Disable UUID conversion on every goddamn server start. Saves start up time if worlds don't need to be converted from older server versions
- Override default gamerule values (by default "announceAdvancements" is set to false by Helios) using config
Command system tweaks:
- Makes default permission denied message configurable (The famous red I'm sorry, but you do not have permission to perform this command... message)
- Also can make override every² plugin permission message (Your server can now have consistent permission messages!)
Server core tweaks:
- Automatic EULA agreement. As you should agree to EULA anyway if you are going to run a Minecraft Server
- Query protocol plugins list response modification (to disallow exposing installed plugins to prying eyes)
Various exploit precautionary tweaks:
- Strict check for item name length on Creative gamemode
- Disable using NBT received from Creative gamemode³
- Disable copying container blocks
- Validate player's locale string

¹ - Not supported outside of Helios
² - Depends how plugin was made.
³ - Might cause confusion, option below is bit better choice

Build Paper server from source, install server (yes, server, not API) jar to local Maven repository
Clone this repository and invoke ./gradlew build
Grab jar from build/libs and put it to mods/ directory of your server
Start server once and configure the Helios
Enjoy :)

MIT