Mixin Watchdog
The author built this one for Minecraft 1.21.1 on NeoForge. On other versions it may install and then do nothing.
Mixin Watchdog is a lightweight developer utility mod that scans all active mixins at runtime and reports which mods are mixing into which classes — including cross-mod interactions.
Features:
- Detects when mods mix into classes from other mods or vanilla Minecraft
- Flags potential mixin conflicts (e.g. multiple mods targeting the same class)
- Logs mixin class names, configs, and source mods
- Outputs to both text and JSON logs in the logs/ folder
- Thread-safe logging with support for large modpacks
Designed to help mod developers, modpack creators, and server admins identify compatibility issues early — before they cause crashes.
No setup required. Just install and launch.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as mixinwatchdog-1.0.2.jar — drop this file into the mods folder
- Download size: 12 KB
- Download link checked 12 Sept 2026 — working
These come from our own check of the pack file, not from the source page.