lmscript

Overview

lmscript is an experimental scripting language and CLI for file operations, structured data, subprocesses, and agent workflows.

It is not a general-purpose application language: there are no classes, closures or packages from a registry, and scripts run with your full local permissions (no sandbox).

Install

lmscript is part of the @lmctl-ai/lmctl npm package (which also installs lmctl). It needs Node.js 24.15 or later on Linux, macOS or Windows.

npm install -g @lmctl-ai/lmctl

lmscript --version
lmscript 0.2.348

A first look

names = ["Ada", "Grace"];
for (n in names) {
  println(f"Hello, {n}!");
}

Links

• Package and versions: npmjs.com/package/@lmctl-ai/lmctl
• Issues and questions: github.com/lmctl-ai/lmctl/issues
• License: proprietary, free during the public preview; the full text is the LICENSE file inside the npm package.
• lmctl documentation: lmctl.com/lmctl

Documentation

Tutorial

Fourteen short steps from hello world to modules, data blocks, commands, checks and dry runs, all with real output.

User guide

The language and CLI reference: syntax, values, control flow, functions, modules, data blocks, commands, the standard library and the experimental _dsl_ blocks.

Skill

What an LLM agent needs to write correct lmscript: idioms, pitfalls, forbidden forms and the verification loop.