VartaPack

A lightweight diagnostics, integrity, and support-report tool for Minecraft modpacks.

VartaPack helps modpack authors understand whether a player's instance is clean, modified, unsupported, or broken. It validates the local environment, detects common setup problems, and generates structured reports that are easy to share when support is needed.

Purpose

VartaPack is not a performance mod.

It is a support layer for modpacks. It helps players see what is wrong and gives authors a clear overview before requesting full logs or crash reports.

Checks

VartaPack can validate:

• Minecraft version
• mod loader
• Java version
• allocated RAM
• required mods
• recommended mods
• blocked mods
• extra mods
• known conflicts
• selected file integrity

Detected issues can be shown through a startup notification and an in-game issues screen.

Pack status

VartaPack classifies the current instance as:

Status	Meaning
Clean	The instance matches the expected profile.
Modified	The player changed something, but no critical issue was detected.
Unsupported	The instance may still run, but support should be limited.
Broken	A critical issue was detected.

Support reports

Players can copy a generated support report with one click.

Reports may include:

• pack name and profile version
• Minecraft version
• loader and loader version
• Java version
• allocated RAM
• operating system
• detected issues
• missing required mods
• blocked mods
• extra mods
• installed mods
• suggested fixes

Reports are useful for GitHub issues, Discord support, CurseForge comments, and Modrinth support threads.

Crash analysis

VartaPack can scan local logs and crash reports for common patterns, such as:

• mixin failures
• missing dependencies
• incompatible mod sets
• duplicate mods
• wrong Java version
• out of memory errors
• renderer conflicts

Crash analysis is meant to help with debugging. It does not replace manual investigation.

Configuration

Modpack authors can configure VartaPack through:

config/vartapack/

Common files:

profile.json
rules.json
integrity.json
vartapack.json

These files define the expected environment, mod rules, conflict rules, integrity checks, support links, and report behavior.

Configuration examples and usage guide are available on GitHub.

Privacy

VartaPack does not collect telemetry.

Reports are generated locally. Logs, mod lists, usernames, file paths, and personal data are not uploaded automatically.

The player decides whether to copy and share a report.

Private paths and usernames are redacted where possible.

Limitations

VartaPack is a client-side diagnostics tool.

It cannot prevent every startup crash, because some crashes happen before any mod code can run. For those cases, use crash reports, doctor mode, and proper loader-level dependency or conflict rules.

Companion use

VartaPack can be used together with PackPing.

Recommended setup:

• VartaPack for diagnostics, integrity checks, and support reports
• PackPing for modpack update notifications

They can also be used separately.