OnActionStuff-0.99.4.jar is a beta file of the Minecraft mod Do Stuff On External Action for Forge, made for Minecraft 1.12.2. It was published on October 30, 2019 and is 1.9 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Do Stuff On External Action mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
