ModsFinder

Melius Commands

by DrexHD

Melius Commands is a server-side Fabric and Quilt library for defining custom commands and changing existing ones through JSON files.

FabricQuiltServer-side onlyMIT LicenseOpen source1.20 – 26.3

What it does

The mod lets a server owner create commands from JSON definitions and modify commands that already exist. Command matchers pick the target by its text as typed during execution, and node matchers pick it by its place in the command structure that Brigadier uses internally. Each matcher offers strict, starts-with and regex flavours, and a requirement modifier can strip a command from players who do not meet its condition.

Only the server needs the mod; players join without installing anything. It is published for Fabric and Quilt across 24 release versions, 1.20 – 26.3, with snapshot builds also published. Files are released under the MIT License, and the source code and issue tracker are public. The mod was first published on 2023-08-13 and last updated on 2026-09-19.

Key features

  1. Custom command creation

    Server owners define new commands in JSON files, with comments allowed, and the files are not copied into code.

  2. Strict, prefix and regex matching

    Modifiers can apply to an exact command, to any command that starts with the given text, or to everything matching a regular expression.

  3. Placeholders in command execution

    Command values can include placeholders for arguments or global values such as player names, and a command can run as a simple string from the console at operator level 4.

  4. Per-player cooldowns

    A cooldown modifier with a chosen identifier limits how often a command can run for each player, with duration formatting supported.

  5. Path inspection

    The melius-commands path command shows which command node paths a command resolves to, which helps when writing modifiers for a specific node.

Compatibility

Latest build for each game version and loader.

26.x5 of 5 versions with builds
26.32.1.3+26.32.1.3+26.3
26.22.1.3+26.22.1.3+26.2
26.1.22.1.3+26.12.1.3+26.1
26.1.12.1.3+26.12.1.3+26.1
26.12.1.3+26.12.1.3+26.1
1.21.x12 of 12 versions with builds
1.21.112.1.3+1.21.112.1.3+1.21.11
1.21.102.1.3+1.21.102.1.3+1.21.10
1.21.92.1.3+1.21.102.1.3+1.21.10
1.21.82.1.3+1.21.82.1.3+1.21.8
1.21.72.1.3+1.21.82.1.3+1.21.8
1.21.62.1.3+1.21.82.1.3+1.21.8
1.21.52.1.3+1.21.52.1.3+1.21.5
1.21.42.1.3+1.21.42.1.3+1.21.4
1.21.32.1.3+1.21.42.1.3+1.21.4
1.21.22.0.0+1.21.2-rc22.0.0+1.21.2-rc2
1.21.12.1.3+1.21.12.1.3+1.21.1
1.212.1.3+1.21.12.1.3+1.21.1
1.20.x7 of 7 versions with builds
ReleaseBetaAlphaNot available

This mod also publishes snapshot builds. Snapshots are not shown in the matrix.

How it compares

Full comparison

Client Execution runs on Fabric in the client and server environment, under CC0 1.0 Universal, and covers 1.20 – 26.3, so it needs installing on clients as well. Datapatched is server-side only on Fabric and NeoForge, open source under the MIT License, and covers 1.21.1 – 26.2, which makes it the closest fit for a mixed-loader server. PlaceholderMaker is also server-side only, on Fabric for 1.21 – 1.21.4, and is not open source under the GNU General Public License v3.0 only.

ModLoadersGame versionsEnvironmentUpdated
Melius CommandsFabric and Quilt1.20 – 26.3Server-side only2026-09-19
Client ExecutionFabric1.20 – 26.3Client and server2026-07-09
DatapatchedFabric and NeoForge1.21.1 – 26.2Server-side only2026-07-05
PlaceholderMakerFabric1.21 – 1.21.4Server-side only2025-01-27

Questions

Which loaders does Melius Commands support?

It is published for Fabric and Quilt. Its file for 26.3 is 2.1.3+26.3, dated 2026-09-19 for both loaders.

Do players need to install Melius Commands?

No. Players join without it, since only the server has to run the mod.

How are the custom command files written?

Commands are defined in JSON files. Every command tree has to begin with a literal node, and certain argument types take further arguments placed after spaces, which the argument types reference lists in full.

In the catalog

Melius Commands is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 8,071 mods support Minecraft 26.3.

Library mods3,514Fabric modsMods for 26.38,071

More from DrexHD

All projects
VillagerConfig1.18.2 – 26.3CrashExploitFixer1.14.4 – 26.3quick pack1.17 – 26.3AntiXray1.16.5 – 26.3Vanish1.18.2 – 26.3Vanilla Permissions1.14 – 26.3

Similar mods

Fabric API1.14 – 26.3Cloth Config API1.14 – 26.3YetAnotherConfigLib (YACL)1.19 – 26.3Architectury API1.16.5 – 26.3Just Enough Items (JEI)1.8 – 26.3Geckolib1.12.2 – 26.3

What the author says

A fabric server side mod to create custom, and modify existing commands To add custom commands, create a json file in./config/melius-commands/commands. For example files, see examples/commands! Apply your changes, by running /reload in-game.
DrexHD, on the Modrinth page

Official listing

Owner
DrexHD
Published
2023-08-13
Updated on Modrinth
2026-09-19
Facts verified
2026-10-15

Tags

LibraryManagementUtility
Open on ModrinthCompare