
Locki
A library for controlling access to the player's inventory
About this Mod
Locki

A Quilt library handling player inventory locking. Can also be used as a standalone mod, through the /locki command.
This mod must be installed on both server and client to work properly.
Overview
Locki represents slots using inventory nodes. Inventory nodes are structured as a tree, allowing commands
or mods to quickly lock or unlock entire sections while retaining controls over finer units.
Inventory nodes are represented as a dot-separated path, from least specific ancestor to most specific child node.
For example inventory describes the entirety of the player's inventory, while inventory.armor.chest
describes the chestplate slot of the inventory.
When an inventory node gets locked, descendant nodes can still be unlocked, allowing you to exclude specific slots
from a broad access ban. For example, locking inventory then unlocking inventory.armor.chest will prevent the player
from touching any item in their inventory except their chestplate.
Commands
Locki adds the /locki command, allowing server operators and mapmakers to interact with the API through
commands.
/locki lock <node> [<targets>] [<lock>]: locks the inventories of one or more players<node>: a full path describing a known inventory node.[<targets>](optional) : If specified, must be either a player's username or a target selector. If unspecified, defaults to the player using the command. When used in a command block, player is not optional.[<lock>](optional) : If specified, must be a valid identifier referencing a registered lock. If unspecified, defaults to the generic "command" lock.
/locki unlock <node> [<targets>] [<lock>]: unlocks the inventories of one or more players[<targets>](optional) : If specified, must be either a player's username or a target selector. If unspecified, defaults to the player using the command. When used in a command block, player is not optional.[<lock>](optional) : If specified, must be a valid identifier that was previously used as a lock to affect the players' inventories. If left unspecified, defaults to the generic "command" lock.
Permissions
If you have LuckPerms installed, the above commands can be used by players with the locki.command.lock permission.
If you only grant locki.command.lock.self, players will only be able to use the commands on themselves.
Developer information
For more information on how to add it to your development environment and how to use it, see the project's readme.
Available Versions
How to Install Locki on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set quilt Loader
In the panel under "Egg", select the quilt loader and matching Minecraft version (1.21).
Install Mod
Open the mod browser in the dashboard and search for "Locki". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21, 1.20.4, 1.20.1 (+2 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Locki server crashes on startup – what to do?
Most common cause: wrong quilt version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21). You can switch loaders with one click in the panel.
Is Locki compatible with quilt?
Locki officially supports quilt for Minecraft 1.21, 1.20.4, 1.20.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Locki – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Locki consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install Locki with just one click on your server.