MapSwitch (Fabric 1.21.11)

MapSwitch adds map-based world switching with per-map player progression/data split.

Features

• Commands:
  • /mapswitch <map>
  • /map switch <map>
• Per-map player-data files in:
  • maps/<map>/playerdata/<uuid>.dat
• Per-map stats and advancements split:
  • maps/<map>/stats/<uuid>.json
  • maps/<map>/advancements/<uuid>.json
• Safe transfer pipeline:
  • save old state
  • load target state
  • force target chunk
  • teleport to target
  • short invulnerability
• Tab-list separation by active map.
• Actionbar map hint for players.

Installation

1. Install Fabric Loader for Minecraft 1.21.11.
2. Install Fabric API.
3. Put mapswitch-<version>.jar in your server mods folder.
4. Create your maps under ./maps/ in server root.

Compatibility

• Server-side utility mod.
• Built for Fabric API on Minecraft 1.21.11.

MapSwitch

MapSwitch is a Fabric server mod for multi-world gameplay with strict per-map player-data separation.

What It Does

• Switch players between maps with:
  • /mapswitch <map>
  • /map switch <map>
  • Keeps map-specific player data isolated:
    • inventory
    • XP / health / hunger
    • ender chest
    • stats
    • advancements
  • Supports map-based tab-list separation.
  • Shows active map hints in actionbar.

Folder Layout

• Maps are read from the server root:
  • ./maps/<map>/

Expected per-map folders:

• playerdata/
• stats/
• advancements/
• DIM-1/ (nether source)
• DIM1/ (end source)
• optional overworld region/, entities/, poi/

Notes

• Built for Fabric + Minecraft 1.21.11.
• Server-side focused mod.
• Requires Fabric API.