CurseForge · Minecraft mod
Leiv's Lib
Leiv's Lib is the lightweight core framework required to power all mods in the Leiv Ecosystem Suite, optimizing performance and streamlining core mechanics under the hood.
Quick answer
Which Leiv's Lib release should I use?
Leiv's Lib_Forge_1.20.1 (v.1.0.0) targets 1.20.1 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Leiv's Lib required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Leiv's Lib_Forge_1.20.1 (v.1.0.0) need?
Leiv's Lib_Forge_1.20.1 (v.1.0.0). Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Leiv's Lib without breaking your instance.
Built for Leiv's Lib_Forge_1.20.1 (v.1.0.0). Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use Leiv's Lib_Forge_1.20.1 (v.1.0.0). It targets 1.20.1 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside Leiv's Lib_Forge_1.20.1 (v.1.0.0). It opens that exact file at the source.
About this project
What does Leiv's Lib add?
⚡ Leiv's Lib
Leiv's Lib is the absolute bedrock and lightweight framework powering the entire Leiv Ecosystem Suite.
Designed with performance, simplicity, and maintainability at its core, this foundational library acts as the central engine for all mods developed under the Leiv banner (such as ItemCuller, KeybindProfiles, EnderStash, and more). By modularizing our code, Leiv's Lib encapsulates shared logic, optimizes background processing, and ensures all dependent mods run smoothly with zero unnecessary overhead or code duplication.
⚠️ PLAYER NOTE: This is a required core dependency for mods within the Leiv Ecosystem. It does nothing on its own, but must be installed alongside any of my utility or quality-of-life mods to ensure they function correctly!
✨ Key Features
- 🚀 Ecosystem Backbone: Seamlessly handles cross-mod communication and shared utility pipelines. It connects the dots so the individual mods can remain "ultra-thin" and incredibly fast.
- ⚡ Zero-Overhead Philosophy: Engineered from the ground up to keep tick overhead near zero. It only runs what is absolutely necessary, maintaining buttery-smooth framerates.
- 🧹 Modular Efficiency: Eliminates redundant code execution across multiple mods. Instead of five mods running the same math calculations, Leiv's Lib handles it once and shares the results, keeping your client and server instances fast and clutter-free.
- 🛡️ Centralized Stability: By centralizing critical logic, updates to the core library automatically improve the stability and performance of the entire mod suite simultaneously.
🛠️ Technical Highlights (For Developers & Modpack Creators)
Under the hood, Leiv's Lib provides powerful abstractions and highly optimized tools engineered specifically for high-efficiency Minecraft modding.
- 📡 LeivEventDispatcher: A highly abstracted, clean event-handling pipeline. It decouples core game events from complex mod logic while maintaining minimal invocation latency, allowing for rapid cross-platform porting.
- 📦 LeivRegistries: A streamlined registry wrapper designed for effortless, safe, and boilerplate-free in-game element registration.
- 📐 RenderMathUtil & LeivMath: Specialized vector and spatial math utilities featuring optimized double-precision calculations. Perfect for ultra-fast 3D distance checks, bounding geometry, and frustum culling.
🔗 Dependencies
Because Leiv's Lib is the absolute foundation of the ecosystem, it is completely self-contained.
- Required Mods: None!
- Used By: Leiv's API, Leiv's Network, Leiv's GUI, Leiv's Config, ItemCuller, and all other Leiv Ecosystem mods.
💬 Community & Support
Got questions, feedback, or need to report a bug? Join the community!
- 👥 Discord: Join Leiv's Community
- 🐛 Issue Tracker: Report bugs via the official Discord ticket system.
Project description from CurseForge.
Pick your setup
Leiv's Lib by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.2
1 loader build1.21.1
2 loader builds1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Leiv's Lib versions and loaders
Leiv's Lib_Forge_1.20.1 (v.1.0.0)
Leiv's Lib_Forge_1.20.1 (v.1.0.0).jar
19 Aug 2026
Leiv's Lib_Forge_1.21.1 (v.1.0.0)
Leiv's Lib_Forge_1.21.1 (v.1.0.0).jar
19 Aug 2026
Leiv's Lib_NeoForge_26.2 (v.1.0.0)
Leiv's Lib_NeoForge_26.2 (v.1.0.0).jar
19 Aug 2026
Leiv's Lib_NeoForge_26.1.2 (v.1.0.0)
Leiv's Lib_NeoForge_26.1.2 (v.1.0.0).jar
19 Aug 2026
Leiv's Lib_NeoForge_1.21.1 (v.1.0.0)
Leiv's Lib_NeoForge_1.21.1 (v.1.0.0).jar
18 Aug 2026
Leiv's Lib_NeoForge_1.21.1 (v.1.0.0)
Leiv's Lib_NeoForge_1.21.1 (v.1.0.0).jar
14 Aug 2026
Looking for an older file? The official CurseForge project page is in Resources.