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PackCompanion project artwork

CurseForge · Minecraft mod

PackCompanion

Pack Companion is the ultimate sentinel mod for 1.12.2 designed to perform a runtime check for modpack stability.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which PackCompanion release should I use?

Updated 3 days ago
Latest stable file packcompanion-1.2.0.jar
Game version 1.12.2
Loader Forge

packcompanion-1.2.0.jar targets 1.12.2 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 3 required mods have matching files.

Where it goes

Is PackCompanion required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release Forge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

Understand client and server requirements Read the Minecraft installation guide

What else does packcompanion-1.2.0.jar need?

packcompanion-1.2.0.jar. Change the file and its required mods may change too.

All 3 required mods have matching files

Install Universal Tweaks, ConfigAnytime, MixinBooter first. We found matching files for this game-version and loader setup. 2 come through another mod in the chain.

1 listed on this file 2 pulled in by those mods
Universal Tweaks Needed by packcompanion-1.2.0.jar
required
Matching file found Matched file: 1.20.1
ConfigAnytime Needed by Universal Tweaks
pulled in
Matching file found Matched file: !configanytime-3.0.jar
MixinBooter Needed by Universal Tweaks
pulled in
Matching file found Matched file: MixinBooter 11.17

2 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.

Before you install it

Add PackCompanion without breaking your instance.

Built for packcompanion-1.2.0.jar. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use packcompanion-1.2.0.jar. It targets 1.12.2 with Forge; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    Install Universal Tweaks, ConfigAnytime, MixinBooter first. We found matching files for this game-version and loader setup. 2 come through another mod in the chain.

  3. 03

    Put it on the correct side

    The project page does not say whether this file belongs on the client, dedicated server, or both.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside packcompanion-1.2.0.jar. It opens that exact file at the source.

About this project

What does PackCompanion add?

Pack Companion

Description

Pack Companion is the ultimate sentinel mod for 1.12.2 designed to perform a runtime check for modpack stability. It automatically identifies mods that are outdated, problematic, or superseded by modern alternatives.

Pack Companion features a deep Config Parser that analyses problematic Config field values through Reflection. It identifies settings that are known to cause crashes or severe performance issues.

Pack Companion is also deeply integrated with Universal Tweaks, and is able to identify mods that have been been superseded or merged into Universal Tweaks's feature set and provides the exact configuration settings required to replace them.

The mod generates both HTML/Markdown reports (found in your config/packcompanion/output folder). These reports provides a clean, readable breakdown of every flagged mod and config setting, complete with direct links to recommended fixes.

Upon joining the world, you will be provided a link to view the reports in your browser.

This mod is built against the Cleanroom Wiki Mod List, a community-maintained database of deprecated 1.12.2 mods and their high-performance alternatives. Pack Companion ensures your modpack aligns with these modern standards, helping you transition away from legacy environments, into a more stable, Cleanroom-optimized environment.

Template Usage

This mod is intended to be used with BareBonesTemplatePack, which provides a pre-configured environment that includes:

  • Curated Optimizations: A minimalistic list of major improvement, QoL and bugfix mods.
  • Standardized Configs: Pre-configured config files for various mods, including Crash Assistant and Universal Tweaks.
  • Workflow Guide: A step-by-step template to update old packs or start new ones with modern 1.12.2 standards.

Master Lists

Pack Companion does not rely on static data. Instead, it utilizes a dynamic Master List system to provide the most current mod recommendations without requiring frequent mod updates:

  • GitHub Master Lists: All data and recommendation logic is hosted on our Master List Directory, which features:
    • Mod Master List: Containing definitions for problematic, outdated, or deprecated mods.
    • Class Checking Master List: A specialized list used to verify the presence of classes across classpath, or to match Hash values of Jar files.
    • Config Master List: A list for auditing mod config fields.
  • JSON Fetching: On every startup, the mod fetches the latest live JSON releases.

Project description from CurseForge.

Pick your setup

PackCompanion by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

1 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

PackCompanion versions and loaders

5 of 5 releases match

Looking for an older file? The official CurseForge project page is in Resources.

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