Installation

@cosyte/astm is a zero-dependency TypeScript package for Node.js. It ships dual ESM + CJS builds with per-condition type declarations, so it works from either module system without configuration.

Status: published on npm, and the public API is settled and stable: the exported names, options, return shapes, and warning codes are the surface a release keeps, and a breaking change bumps the minor version with its migration in the changelog. Two surfaces are still moving, both additively: the built-in profile registry and the warning and error code sets.

Prerequisites

• Node.js 22 or later, tested on 22, 24, and 26 (the whole @cosyte/* suite targets ES2023).
• A package manager: pnpm, npm, or yarn.

Install

npm install @cosyte/astm

Smoke test

Confirm the package resolves and its version symbol is present:

import { VERSION } from "@cosyte/astm";

console.log(VERSION);

If that prints a version string, the install is good: head to the Quickstart.