Disabler: Spawn, Biome, Dimension & Structure Control

About

A server-side utility mod that gives admins control over mob spawns, structure generation, dimension access, and world composition - powered by a simple config file.

You can control:

Block mob spawns

• Remove mobs from biome spawn lists
• Cancel runtime spawn attempts Disable structures
• Prevent entire structure types from generating
• Remove their custom mob spawn overrides Remove biomes
• Fully exclude specific biomes from world generation
• Cleanly prevent them from appearing in new worlds
• Includes extra compatibility handling for Alex's Caves cave biome generation paths Disable dimensions
• Cancel dimension travel before entities enter blocked dimensions
• Prevent new Nether portals from forming when minecraft:the_nether is blocked
• No spawn-teleport fallback: players stay where they are Simple TOML file
• No commands, no GUI
• Server-side only
• No client install required
• Optional singleplayer support
• Same config/disabler-server.toml format on NeoForge, Forge, and Fabric

Configuration

The config file is located at:

.minecraft/config/disabler-server.toml

[spawns]
    #List of mob ids that should never appear in the world.
    #Examples: "minecraft:zombie", "minecraft:creeper"
    blocked_mobs = []

[structures]
    #List of structure ids that should be removed from world generation.
    #Examples: "minecraft:village_plains", "minecraft:mineshaft"
    blocked_structures = []

[biomes]
    #List of biome ids that should be fully removed from world generation.
    #Examples: "minecraft:plains", "minecraft:swamp"
    blocked_biomes = []

[dimensions]
    #List of dimension ids that entities should not be able to enter.
    #Dimension travel is cancelled before the entity changes level.
    #Examples: "minecraft:the_nether", "minecraft:the_end"
    blocked_dimensions = []

[biome_exceptions]
    #List of biome ids that should NOT be included in the replacement pool.
    #These biomes have special generation requirements (e.g., mushroom biome on islands).
    #They will be kept as fallback if no other allowed biomes exist.
    #By default, minecraft:mushroom_fields is excluded.
    #Examples: "minecraft:mushroom_fields", "minecraft:deep_dark"
    exceptions = ["minecraft:mushroom_fields"]

• Biome Exceptions: By default, minecraft:mushroom_fields is listed in biome_exceptions. This prevents it from being used as a replacement for blocked biomes, since mushroom biomes have special generation requirements. You can remove it from this list if you want mushroom biomes to be used as replacements.
• Dimension Blocking: Add dimension ids such as minecraft:the_nether or minecraft:the_end to blocked_dimensions. Travel is cancelled before the entity changes level, with portal cooldown applied to avoid repeated triggers.
• Config is written to disk: When the mod generates the config file for the first time, it includes the default minecraft:mushroom_fields in the exceptions list. Edit the file to customize this behavior.

Watch on GitHub how it works!

Future Plans

• Loot control (chests / vaults)
• Mob loot & EXP locks …and more