MobSpawnController

A lightweight server-side mod that lets you control mob spawning behavior and attributes through commands or an intuitive in-game GUI.

Features

Spawn Control

• Enable or disable spawning for any mob, per spawn type (NATURAL, SPAWNER, BREEDING, EVENT, etc.)
• Fine-grained control: disable natural spawning while keeping spawner-based spawning, or vice versa
• Works with all mods' mobs — if it's registered as an entity type, it can be controlled

Attribute Override

• Modify any mob attribute (health, damage, speed, armor, etc.) on a per-mob basis
• Supports boolean, numeric, and percentage-based attribute controls
• Attribute overrides are applied when mobs finalize their spawn

In-Game GUI

• Mob list with Xaero mob icon display
• Search by mob ID or translated name
• Filter by source mod, spawn status (enabled/disabled/partial), and attribute modification status
• Toggle spawn types and edit attributes with per-type granularity per mob

Commands

• /mobspawncontroller <mob> <spawnType> <true|false> — toggle spawn rules
• /mobspawncontroller list [mob] — view current rules
• /mobspawncontroller clear <mob|all> — reset rules
• Short alias: /mss
• Tab-completion for mob IDs and spawn types

Storage

• Rules are saved as JSON per world (in data/mobspawncontroller/rules.json)
• Automatically loads on server start, saves on server stop