ModsFinder

RzmLib

by rzmao

RzmLib is a Fabric library that provides shared support code for other Rzm mods, starting with the RZMAO SeriousCat mod series.

FabricClient and serverAll rights reserved1.21.1

What it does

Other mods in the Rzm and SeriousCat series depend on RzmLib for common features. The library bundles key input synchronization between client and server, player morph rendering replacement, custom HUD elements used across the SeriousCat mods, and an orbiting entity system. Mods such as RzmYsid require it, while other mods in the series can run without it.

RzmLib also ships a particle visual effects helper, the rzm command framework and a set of common utilities and helper APIs. It runs on Fabric for Minecraft 1.21.1 only, and the environment is client and server, so both sides need it. The mod is published under All rights reserved and is not open source, though its source code is public.

Key features

  1. Key input synchronization

    Keybinds pressed on the client are synchronized with the server, so mods that rely on key input can act consistently across both sides.

  2. Player morph rendering

    Replaces how a player's model is rendered, which other mods use to show morph and disguise effects.

  3. Custom HUD elements

    Provides HUD elements commonly used by SeriousCat mods, so dependent mods do not need to draw them separately.

  4. Orbiting entity system

    Lets mods attach entities that orbit around another entity, a behavior several SeriousCat mods use.

Compatibility

Latest build for each game version and loader.

1.21.10.1.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Use cases

Running RzmYsid

RzmYsid needs RzmLib installed on both the client and the server before its features work.

Who it’s for: Players who use SeriousCat or Rzm mods, and server owners who run them, need RzmLib in place for the dependent mods to load. Mod developers in the series use it as a shared base.

How it compares

Full comparison

Chroma is a client-side only Fabric library for 1.21.11 under All rights reserved, so it does not run on a server. Alexandria Lib is a client and server library for Fabric and NeoForge on 1.21.1 under All rights reserved, which covers loaders RzmLib does not target. pyke-lib is a client and server library for Fabric across 1.20.1 – 26.1.2 and is open source under the GNU Lesser General Public License v3.0 only.

ModLoadersGame versionsEnvironmentUpdated
RzmLibFabric1.21.1Client and server2026-04-23
ChromaFabric1.21.11Client-side only2026-07-05
Alexandria LibFabric and NeoForge1.21.1Client and server2026-09-30
pyke-libFabric1.20.1 – 26.1.2Client and server2026-06-10

Questions

Does RzmYsid need RzmLib?

Yes. RzmYsid requires RzmLib to be installed, and the mods work properly only with the library present.

Does RzmLib have to be installed on both sides?

Yes. Servers that run it need every player to install it too.

Which Minecraft version does RzmLib support?

Only 1.21.1. The latest Fabric file is 0.1.0 for 1.21.1, published on 2026-04-23.

In the catalog

RzmLib is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 32,366 mods support Minecraft 1.21.1.

Library mods3,514Fabric modsMods for 1.21.132,366

More from rzmao

All projects
maomod1.20.4

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

本模组是认真猫系列模组的核心前置轻量库，为其他 Rzm 模组提供底层支持。 如果你想使用 RzmYsid 等模组，则必须安装本前置模组，否则这些模组将无法正常运行。 功能包括： - 按键输入与 Client-Server 订阅系统 - 玩家形态渲染替换 - 认真猫常用的自定义 HUD - 环绕实体系统 - 粒子与视觉特效支持 - /rzm 命令框架 - 常用工具与辅助 API
rzmao, on the Modrinth page

Official listing

Owner
rzmao
Published
2026-04-23
Updated on Modrinth
2026-04-23
Facts verified
2026-10-15

Tags

Library
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