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Pack Doctor - Modpack Diagnostics

Finds why your modpack breaks: dependencies, crashes with root causes, broken configs, recipe errors. Read only, works offline.
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os-pack-doctor-neoforge-1.21.1-1.0.0.jar

File nameos-pack-doctor-neoforge-1.21.1-1.0.0.jar
Uploaded
Oct 22, 2026
Downloads
14
Size
754.7 KB
Mod Loaders
NeoForge
File ID
9286511
Type
B
Beta
Supported game versions
  • 1.21.1

Curse Maven Snippet

NeoForge

implementation "curse.maven:pack-doctor-modpack-diagnostics-1759386:9286511"

Learn more about Curse Maven

What's new

Changelog

1.0.0

Welcome to the first beta of the mod! Please leave your feedback in the comments. It will help us fix bugs faster, add the features you need, and keep improving the mod. Thanks ❤

  • Eight tabs: Overview, Mods & dependencies, Logs & crashes, Configs, Data & recipes, Performance, Report, Settings. Opens from the Mods list or a key you assign (no key by default).
  • Mods and dependencies from the running loader and from the jars in the mods folder: missing required mods, wrong version ranges, mods for another Minecraft or NeoForge, incompatible and not recommended pairs, duplicate mod ids, identical copies, Fabric and old Forge jars, damaged jars. Jar-in-jar libraries are taken into account.
  • Log and crash report analysis with 49 built-in rules, grouping of repeats with line numbers and context, root cause from the exception chain, follow-up errors marked as consequences, "not classified" for unknown errors. Big, empty, damaged, gzip and Windows-1251 logs are handled safely.
  • TOML and JSON syntax check with line and column; value check against the mods' own config specs; unknown keys are never errors.
  • Recipe, tag, loot table, advancement and function errors captured live while a world loads.
  • FPS, frame time, memory and tick graphs for the last 60 seconds. Can be turned off.
  • Optional local snapshots of the pack and a list of changes since the last check (asks for permission first).
  • TXT and JSON reports with section choice, preview, privacy masking and a short summary to copy. Never overwrites a file, explains write errors and lets you pick another place.
  • Your own log rules in config/ospackdoctor/rules/*.json.
  • /packdoctor scan for server operators.
  • The same jar runs without the game (java -jar) with a small window or from the command line.
  • English and Russian.

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