⚙️ Utility Core Fixes

Compatibility fixes and crash prevention for modded Minecraft servers.

✨ Overview

Utility Core Fixes is a Swiss Army knife of crash prevention and compatibility fixes for modded Minecraft servers. Each fix targets a specific broken interaction between popular mods (or vanilla) that would otherwise crash the server or break gameplay. All features are toggleable individually from config/utility_core_fixes-common.toml (or the in-game mod menu).

What it covers:

Server safety — clamp negative damage, cap OutpostZero infection damage
Mod compatibility — Corail Tombstone, Curios API, EvilCraft, OutpostZero fixes
World integrity — remove orphaned block entity data to stop chunk-load crashes
Anti-cheat tuning — whitelist entities from vanilla's moved too quickly vehicle check
Nether portal reliability — remembers the correct return portal instead of vanilla's error-prone closest-portal search

🎯 Features

🛡️ Negative Damage Fix

Clamps negative damage values to zero, preventing IllegalArgumentException: Damage cannot be negative server crashes from any mod interaction (e.g., Apothic Attributes + Tombstone).

🧬 OutpostZero Infection Damage Cap

Caps outpostzero:infection damage to 10,000 so armor is not destroyed before death events fire.

🔨 Block Entity Mismatch Fix

Prevents crashes from stale block entity NBT by removing orphaned block entity data when a block/entity type mismatch is detected on chunk load (e.g., after a mod that changed block entity types is removed).

🕵 Curios Loot Predicate Crash Fix

Prevents a server crash caused by Curios API's NBT merging during loot table predicate evaluation. Requires Curios to be present, but the mod does not hard-depend on it.

☯️ Corail Tombstone Compatibility

GUI Scale Fix — Prevents Tombstone from forcing GUI scale to 4 when opening its menus; restores your configured scale on close
Item Init Fix — Properly initializes NBT data for Tombstone items (lollipop color, magic_scroll random effect) when obtained via /give or creative menu
Error Handler — Suppresses mixin errors from Tombstone's ItemInputMixin to prevent crashes on server startup

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🚕 Vehicle Anti-Cheat Whitelist

Whitelists entity types from vanilla's moved too quickly vehicle anti-cheat, preventing spam of warnings like entity.evilcraft.broom (vehicle of X) moved too quickly!. Hooks the inline vehicle check inside ServerGamePacketListenerImpl.handleMoveVehicle (the dedicated isVehicleMovingTooFast / checkVehicleMovement methods no longer exist in 26.2).

Supports wildcards: "modid:*" whitelists every entity of that mod
Scoped redirect: only neutralizes the vehicle check for whitelisted vehicles, leaving player movement, difficulty and gamemode permission checks untouched

🌞 Nether Return Portal Fix

Fixes vanilla's unreliable Nether portal linking in multiplayer: normally, returning through a portal searches for the closest portal on the other side instead of the exact one you originally used, which can send you to the wrong portal when several exist near each other. This fix remembers which portal you departed from every time you cross between the Overworld and the Nether, paired with the portal you arrived at, and redirects you back to that exact remembered portal on the return trip — falling back to vanilla behavior if it no longer exists.

⚙️ Fully Configurable

Every feature can be enabled/disabled individually via config/utility_core_fixes-common.toml:

Config	Default	Mod	Why
`enableTombstoneGuiScaleFix`	true	Corail Tombstone	Tombstone forces GUI scale to 4 when opening its screens. This restores the original scale when closing.
`enableTombstoneItemInitFix`	true	Corail Tombstone	Tombstone items (lollipop, magic_scroll) obtained via `/give` lack proper NBT data. This initializes them correctly.
`enableTombstoneErrorHandler`	true	Corail Tombstone	Tombstone's `ItemInputMixin` fails to apply on certain NeoForge versions. Instead of crashing, this suppresses the error gracefully.
`enableNegativeDamageFix`	true	Apothic Attributes + Tombstone	Apothic critical strikes + Tombstone Decrepitude can produce negative damage values, crashing the server with `IllegalArgumentException: Damage cannot be negative`. This clamps damage to 0.
`enableOutpostZeroDamageCap`	true	OutpostZero	OutpostZero infection damage can bypass death events and destroy armor before the player dies. Caps damage at 10000 to allow death events to fire first.
`enableBlockentityMismatchFix`	true	Any mod that changes block entity types	Orphaned block entity NBT from a removed/changed mod crashes chunk loading. This strips the stale data instead.
`enableCuriosLootPredicateFix`	true	Curios API	Curios' NBT merging during loot table predicate evaluation crashes the server. This neutralizes the failing merge.
`enableVehicleAntiCheatWhitelist`	true	Vanilla / EvilCraft	Whitelists configured entity types from the `moved too quickly` vehicle anti-cheat.
`vehicleAntiCheatWhitelist`	`["evilcraft:broom"]`	EvilCraft	List of entity type IDs (`namespace:path`) to whitelist. Supports wildcards like `"modid:*"`.
`enableNetherReturnPortalFix`	true	Vanilla	Vanilla's closest-portal search can send players to the wrong Nether portal on return trips. This remembers and redirects to the exact portal originally used.

📄 Requirements

Minecraft	26.2
NeoForge	26.2.0.37-beta+

Side: Client + Server (universal). Install on both for all fixes to apply.

Optional dependencies (fixes only activate when the mods are present):

Corail Tombstone
OutpostZero
Curios API
EvilCraft (for vehicle anti-cheat whitelist)

🎮 How to Use

Install the mod on both client and server.
Nothing to configure for the defaults to work — every fix is enabled by default.
Disable anything you don't need via config/utility_core_fixes-common.toml or the in-game mod menu.
For the vehicle anti-cheat whitelist: add the entity IDs you want to allow to vehicleAntiCheatWhitelist (wildcards supported).

🙏 Credits

Developed by Stalking Dragons.

https://codex.skdragons.com/
Codex Stalking Dragons — Minecraft Modding