Mjolnir

Mjolnir provides a Lua‑based environment for automating tasks on macOS. Users create a configuration file at ~/.mjolnir/init.lua that loads built‑in and third‑party modules, then write Lua scripts to control applications, windows, hotkeys, alerts, and other system functions. The core app simply hosts the Lua interpreter; functionality is added by installing modules via LuaRocks or other means.

The tool is aimed at macOS power users and developers who want lightweight, scriptable automation without a heavyweight framework. By exposing a stable API and allowing custom modules, it lets users bind global shortcuts, manipulate window geometry, query running processes, and display on‑screen messages, all from concise Lua code.

Mjolnir emphasizes stability, low resource usage, transparency, and minimalism. It runs continuously after a single launch, avoids background polling, and keeps memory and battery impact minimal, making it suitable for users who need reliable, unobtrusive automation on their Mac.