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MixinBooter

By CleanroomOwner

, RongmarioLead Developer

CleanroomMC

0.5★ 2.5★ 5★

Gameplay

0.0

Aesthetics

0.0

0.5★ 2.5★ 5★

The Mixin Library for 1.8 - 1.12.2.

No Theme No Genre QoL & Tweaks Bug Fixes API/Library

Mod Loaders

Forge

Minecraft

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5.0

Never had any issues

smeagle-0

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Contributor 100 pts

Guide 500 pts ←

Veteran 1,500 pts

Luminary 4,000 pts

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MC 1.12

Performance

4.5

Lets mods from 1.8 to 1.12.2 use mixins in the same way newer versions can. Also lets you uninstall MixinBootstrap as it has compatibility for it.

5.0

smeagle-0

Reputation ranks

Explorer 0 pts

Contributor 100 pts

Guide 500 pts ←

Veteran 1,500 pts

Luminary 4,000 pts

Ranks only ever go up; points can drop but your rank stays.

About reputation ranks

MC 1.12

Get it on

Available Platforms

CurseForge

Modrinth

Compatibility

Supported Environments

Where It Runs

Client and Server

Must be installed on both the client and the server.

About

Project Details

Type

Mod

License

GNU Lesser General Public License v2.1 only

Latest Version

MixinBooter 11.18

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CurseForge ID

Modrinth ID

Resources

External Links

Source Issues Wiki Discord

About

Description

MixinBooter

Allows any mixins that work on mods to work effortlessly on 1.8 - 1.12.2

Current Mixin Version: CleanMix 0.2.9 by CleanroomMC, a fork of SpongePowered/Fabric Mixin (0.8.7)
Current MixinExtra Version: 0.5.4

Pseudo-Changelog:

As of 4.2, MixinBooter's API has changed and all mods that uses mixins are encouraged to depend on MixinBooter, even those that mixin into vanilla/forge/library classes. To avoid mixin version mismatches with mods crashing trying to implement modded mixins (looking at you VanillaFix). Thanks to @embeddedt recommending and helping me introduce this change!
As of 5.0, MixinExtras by @LlamaLad7 is shaded. Available for developers to use.
As of 8.0, MixinBooter will now work from 1.8 - 1.12.2. One single build works with all these versions! (TODO: LiteLoader support?)
As of 8.4, MixinBooter actively attempts to be compatible with SpongeForge
As of 9.2, MixinBooter reinstates the older MixinLoader annotation for 1.8.x usages.
As of 10.0, MixinBooter follows Mixin 0.8.7
As of 11.0, MixinBooter is built on CleanMix. As an effort to create an unified backend with Cleanroom.
- No longer would you need to declare dependencies for the annotation processor yourself.
- Also adds a config file (config/mixinbooter.cfg) to blacklist mixin configs and toggle debug options
- Dedicated logs/mixinbooter.log mixin log. With ability to trace class-loading for precise debugging.
- Allows traditional MixinConfig + MixinConnector manifest attribute entries to be fully involved in the ecosystem
- Mod discovery for mixin owners, better isModLoaded checks
- Suppresses Forge's corrupt zip warnings
- Phased out mixin "phases"

For Developers ~ Getting Started:

Add CleanroomMC's repository and depend on MixinBooter's maven entry:

repositories {
    maven {
        url 'https://maven.cleanroommc.com'
    }
}

dependencies {
    def mixin = 'zone.rong:mixinbooter:11.0'

    implementation (mixin) {
        transitive = false
    }
    annotationProcessor mixin

    // RetroFuturaGradle for refmap generation:
    modUtils.enableMixins(mixin)
    // modUtils.enableMixins(mixin, 'mod_id.mixins.refmap.json') << add refmap name as 2nd arg (optional)
}

Pick how to register your mixin configurations. MixinBooter supports lots of approaches:

(As of 11.0, early/late divide is no longer present, therefore IEarly/ILateMixinLoaders are deprecated)

MixinConfigs manifest attribute: no loader class needed. Add a space-separated list of your mixin configuration names to your jar's manifest. MixinBooter reads it straight from the jar's manifest and registers them.
MixinConnector manifest attribute: register configs programmatically. Point it at a class implementing org.spongepowered.asm.mixin.connect.IMixinConnector, its connect() is called during boot, where you call Mixins.addConfiguration(...) yourself.

Both manifest attributes are set on your jar task:

jar {
    manifest {
        attributes(
                'MixinConfigs': 'mixins.mymod.json',
                'MixinConnector': 'com.example.mymod.MyMixinConnector'
        )
    }
}

public class MyMixinConnector implements IMixinConnector {

    @Override
    public void connect() {
        // Check if mod is loaded before registering?
        // Possible with zone.rong.mixinbooter.service.ModDiscoverer.isModPresent(String modId)
        Mixins.addConfiguration("mixins.mymod.json");
    }

}

MixinBooter

Allows any mixins that work on mods to work effortlessly on 1.8 - 1.12.2

Current Mixin Version: CleanMix 0.2.9 by CleanroomMC, a fork of SpongePowered/Fabric Mixin (0.8.7)
Current MixinExtra Version: 0.5.4

Pseudo-Changelog:

As of 4.2, MixinBooter's API has changed and all mods that uses mixins are encouraged to depend on MixinBooter, even those that mixin into vanilla/forge/library classes. To avoid mixin version mismatches with mods crashing trying to implement modded mixins (looking at you VanillaFix). Thanks to @embeddedt recommending and helping me introduce this change!
As of 5.0, MixinExtras by @LlamaLad7 is shaded. Available for developers to use.
As of 8.0, MixinBooter will now work from 1.8 - 1.12.2. One single build works with all these versions! (TODO: LiteLoader support?)
As of 8.4, MixinBooter actively attempts to be compatible with SpongeForge
As of 9.2, MixinBooter reinstates the older MixinLoader annotation for 1.8.x usages.
As of 10.0, MixinBooter follows Mixin 0.8.7
As of 11.0, MixinBooter is built on CleanMix. As an effort to create an unified backend with Cleanroom.
- No longer would you need to declare dependencies for the annotation processor yourself.
- Also adds a config file (config/mixinbooter.cfg) to blacklist mixin configs and toggle debug options
- Dedicated logs/mixinbooter.log mixin log. With ability to trace class-loading for precise debugging.
- Allows traditional MixinConfig + MixinConnector manifest attribute entries to be fully involved in the ecosystem
- Mod discovery for mixin owners, better isModLoaded checks
- Suppresses Forge's corrupt zip warnings
- Phased out mixin "phases"

For Developers ~ Getting Started:

Add CleanroomMC's repository and depend on MixinBooter's maven entry:

repositories {
    maven {
        url 'https://maven.cleanroommc.com'
    }
}

dependencies {
    def mixin = 'zone.rong:mixinbooter:11.0'
    
    implementation (mixin) {
        transitive = false
    }
    annotationProcessor mixin

    // RetroFuturaGradle for refmap generation:
    modUtils.enableMixins(mixin)
    // modUtils.enableMixins(mixin, 'mod_id.mixins.refmap.json') << add refmap name as 2nd arg (optional)
}

Pick how to register your mixin configurations. MixinBooter supports lots of approaches:

(As of 11.0, early/late divide is no longer present, therefore IEarly/ILateMixinLoaders are deprecated)

MixinConfigs manifest attribute: no loader class needed. Add a space-separated list of your mixin configuration names to your jar's manifest. MixinBooter reads it straight from the jar's manifest and registers them.
MixinConnector manifest attribute: register configs programmatically. Point it at a class implementing org.spongepowered.asm.mixin.connect.IMixinConnector, its connect() is called during boot, where you call Mixins.addConfiguration(...) yourself.

Both manifest attributes are set on your jar task:

jar {
    manifest {
        attributes(
                'MixinConfigs': 'mixins.mymod.json',
                'MixinConnector': 'com.example.mymod.MyMixinConnector'
        )
    }
}

public class MyMixinConnector implements IMixinConnector {
    
    @Override
    public void connect() {
        // Check if mod is loaded before registering?
        // Possible with zone.rong.mixinbooter.service.ModDiscoverer.isModPresent(String modId)
        Mixins.addConfiguration("mixins.mymod.json");
    }
    
}

Versions

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Statistics

2,888

Modpacks using this mod

14.6m

Total Downloads

CurseForge

12.5m

Modrinth

Oct 12, 2026

Last Updated

CurseForge

Oct 12, 2026

Modrinth

Oct 12, 2026

Nov 11, 2020

Created

CurseForge

Nov 11, 2020

Modrinth

Sep 2, 2023

8 hours ago

Last synced

When ModDex last fully re-synced this project from CurseForge or Modrinth. A new file release triggers one, usually within minutes, and every project is also re-synced on a schedule. Edits that ship no file, such as a new description or screenshots, are checked for every few hours and can appear before this date changes.

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Get it on

Available Platforms

CurseForge

Modrinth

On ModDex

Community snapshot

Ratings

Followers

In stacks

By the numbers

Statistics

2,888

Modpacks using this mod

14.6m

Total Downloads

CurseForge

12.5m

Modrinth

Oct 12, 2026

Last Updated

CurseForge

Oct 12, 2026

Modrinth

Oct 12, 2026

Nov 11, 2020

Created

CurseForge

Nov 11, 2020

Modrinth

Sep 2, 2023

8 hours ago

Last synced

New file updates sync automatically

How syncing works

Resources

External Links

Source Issues Wiki Discord

MixinBooter

Reviews

Filters

Never had any issues

Never had any issues

Available Platforms

Supported Environments

Project Details

Embed Badge

Platform IDs

External Links

Description

MixinBooter

Allows any mixins that work on mods to work effortlessly on 1.8 - 1.12.2

Pseudo-Changelog:

For Developers ~ Getting Started:

MixinBooter

Allows any mixins that work on mods to work effortlessly on 1.8 - 1.12.2

Pseudo-Changelog:

For Developers ~ Getting Started:

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