Combat Persistence

Combat Persistence is a server-side Fabric mod designed for competitive Minecraft servers. It prevents "combat logging" by spawning a vulnerable NPC whenever a player disconnects while in combat, ensuring that players cannot evade death by simply closing the game.

Key Features

• Smart Combat Tagging: Monitors player interactions and tags those in combat. Configurable duration and action bar feedback.
• Persistent NPCs: disconnects while tagged spawn a Mannequin NPC at the player's exact spot.
  • NPCs mirror the player's visual appearance (Armor, Skins, Held Items).
  • NPCs are backed by NBT data, meaning they survive chunk unloads and server restarts.
• Reliable Offline Deaths: If your NPC is killed while you are offline, you will find yourself at the death screen upon rejoining. No "ghost items" or survival glitches.
• Advanced Dupe Protection: Rigorously tested logic that clears both the inventory and the cursor stack (carried items) immediately on disconnect to eliminate duplication exploits.
• Built-in Secure Authentication:
  • Session Management: Remembers your login state (24-hour session for cracked, 30 days for premium).
  • Premium Verification: Use /premium to link your account to Mojang's official servers for enhanced security and convenience.
  • Safe Limbo: Teleports unauthenticated players to a lobby and hides their coordinates to prevent world-leaking.
• Command Blocking: Prevent players from running /tp, /home, or /spawn to escape a fight.
• No Client Needed: This is a 100% server-side mod. Your players don't need to install anything!

Configuration

All settings can be customized in config/combatpersistence.json:

Combat Settings

• combatTagDurationSeconds: (Default: 15) Customize the length of the tag.
• blockedCommands: Add your own custom commands to the blacklist (e.g., /spawn, /home).
• npcNamePrefix: (Default: §7[OFFLINE] §f) Change how offline players are labeled in-game.
• playSpawnSound: (Default: true) Plays a thunder sound when an NPC spawns.

Authentication Settings

• enableAuth: (Default: true) Toggle the entire authentication system on or off.
• forceAuthInOfflineMode: (Default: true) Requires authentication even if the server is in offline mode.
• sessionDurationHours: (Default: 24) How long an autologin session lasts.
• lobbyDimension: (Default: overworld) The dimension where unauthenticated players are held.

Requirements

• Fabric Loader
• Fabric API
• Minecraft 26.1+
• Java 25+

Support

If you find this mod useful, you can support development here:
ko-fi.com/pottersgame

Why Combat Persistence?

Unlike many other combat-log solutions, Combat Persistence is built with an exploit-first mindset. We have manually patched duplication glitches involving cursor stacks, inventory ghosting, and authentication bypasses that plague other similar mods.

Source Code | Issue Tracker | GPL-3.0 License