Nexus Mechanics

NexusMechanics

NexusMechanics is a configurable mechanics and gameplay management plugin for Minecraft servers running Paper 1.21.11. It gives server administrators control over combat damage, enchantment levels, crafting recipes, mob drops, smithing upgrades, and selected item abilities.

The plugin is designed for servers that need more control over vanilla Minecraft mechanics without having to install a separate plugin for every individual restriction.

Features

TNT Minecart Damage Limiter

Control how much damage TNT minecarts can deal to players.

• Set a maximum damage percentage based on the player's maximum health.
• Configure the percentage in the plugin configuration.
• Enable or disable the mechanic independently.
• Prevent TNT minecart explosions from dealing more damage than the configured limit allows.

This feature is useful for Lifesteal, PvP, and competitive survival servers where TNT minecarts should not deal excessive damage.

Enchantment Level Restrictions

Set maximum levels for individual enchantments.

• Configure a separate maximum level for each enchantment.
• Support registered enchantments, including enchantments provided by other plugins when registered through Minecraft's enchantment registry.
• Set limits using administrator commands.
• Remove individual enchantment restrictions whenever necessary.
• Receive tab-completion suggestions for available enchantments when setting limits.
• Receive suggestions for currently limited enchantments when removing restrictions.
• Enable or disable the entire enchantment restriction system.

The plugin also checks player inventories and dropped items periodically, correcting enchantment levels that exceed configured limits.

Smithing Upgrade Restrictions

Control which equipment upgrades players can perform using a smithing table.

• Block specific equipment upgrades.
• Configure blocked upgrade combinations in the configuration file.
• Prevent restricted upgrades from producing a result.
• Enable or disable smithing restrictions independently.

For example, administrators can block the diamond-to-netherite helmet upgrade while leaving other smithing recipes available.

Mob Drop Management GUI

Manage mob drops through an in-game graphical interface.

• Open a drop-management menu for a selected mob.
• Configure chances for supported vanilla drops.
• Add custom drop entries.
• Configure the chances of custom drops.
• Remove custom drop entries.
• Remove individual vanilla drop chance rules.
• Save settings to the plugin configuration.
• Manage different mob types separately.

This allows administrators to customize loot progression, reduce the availability of powerful items, and create server-specific drop systems.

Important: Vanilla drop chance adjustments apply to items already generated by Minecraft's normal loot process. They do not independently create a vanilla drop when Minecraft did not generate it.

Recipe Restrictions

Control which vanilla crafting recipes are available to players.

• Block all vanilla recipes handled by the plugin's recipe restriction system.
• Block recipes based on their output item.
• Remove restrictions from individual output items.
• View the current recipe restriction settings.
• Enable or disable recipe restrictions independently.

For example, administrators can block recipes that produce Totems of Undying or prevent specific items from being crafted on a server.

Elytra Flight Restriction

Disable Elytra flight when the feature is enabled.

• Prevent players from starting Elytra gliding.
• Enable or disable the restriction independently.

This can be useful for PvP arenas, challenge servers, or worlds where aerial movement should be restricted.

Trident Riptide Restriction

Disable the Riptide ability of enchanted tridents.

• Prevent the use of Riptide when the restriction is enabled.
• Leave other plugin mechanics configurable separately.
• Enable or disable the restriction independently.

Independent Feature Toggles

NexusMechanics allows administrators to enable or disable supported mechanics separately instead of switching the entire plugin off.

Supported toggles include:

• TNT minecart damage limiting
• Enchantment level restrictions
• Smithing restrictions
• Mob drop management
• Recipe restrictions
• Mace smash damage limiting
• Elytra flight restriction
• Trident Riptide restriction

Configuration and Administration

The plugin stores its settings in config.yml, allowing administrators to customize supported mechanics and preserve their settings across server restarts.

Administrative commands can be used to manage feature toggles, enchantment limits, recipe restrictions, and drop settings. The plugin also includes a configuration reload command.

Commands

The plugin uses /nm as its command shortcut.

Command	Description
/nm help	Displays the available commands.
/nm list	Lists supported mechanics and their enabled states.
/nm feature <feature> <on|off>	Enables or disables a specific feature.
/nm toggle <feature>	Toggles a feature on or off.
/nm damage <percentage>	Sets the TNT minecart damage limit percentage.
/nm limit <enchantment> <level>	Sets the maximum level for an enchantment.
/nm unlimit <enchantment>	Removes an enchantment level restriction.
/nm drops <MOB_TYPE>	Opens the mob drop management GUI.
/nm vanilla-drop <mob> <material> <chance|remove>	Configures or removes a vanilla drop chance rule.
/nm recipes all <on|off>	Enables or disables global vanilla recipe blocking.
/nm recipes block <MATERIAL>	Blocks recipes that produce the specified item.
/nm recipes unblock <MATERIAL>	Removes the recipe restriction for the specified item.
/nm recipes list	Displays the current recipe restrictions.
/nm reload	Reloads the plugin configuration.

Replace placeholders such as <feature>, <enchantment>, <level>, and <MATERIAL> with the appropriate values.

Permissions

Administrator permission: nexusmechanics.admin

This permission is required to use the plugin's administrative commands and management features.

Installation

1. Download the NexusMechanics plugin JAR.
2. Place the JAR file in your server's plugins directory.
3. Start or restart your Paper server.
4. Open the generated plugins/NexusMechanics/config.yml file to review the settings.
5. Configure the mechanics you want to use.
6. Use /nm help in-game to view the available commands.

Compatibility

• Minecraft server software: Paper
• Target version: Minecraft 1.21.11
• Java: Java 21

Compatibility with other Minecraft versions or server implementations has not been confirmed.

Designed for Custom Minecraft Servers

NexusMechanics is especially useful for:

• Lifesteal servers
• PvP and competitive survival servers
• SMP servers with custom progression
• Servers that need stricter enchantment limits
• Servers with custom loot and crafting rules
• Server owners who want to customize vanilla gameplay mechanics

The goal of NexusMechanics is simple: give server administrators more control over Minecraft gameplay through configurable mechanics and convenient management commands.

Found a bug, an error, or something that doesn't work as expected?

Please write to me on discord and describe the problem.

If possible, include:

Your Minecraft and Paper versions. The error message from the server console. The steps needed to reproduce the problem.