babel-upgrade

A tool to automatically upgrade Babel 6 projects to Babel 7. It updates dependencies, config files (.babelrc, babel key in package.json), and JavaScript files that import Babel packages directly. Stable version is v1.0.1, though previously released as v0.x. No regular release cadence; last release was in 2019. Key differentiators: it automates the rename of packages (e.g., babel-preset-env → @babel/preset-env), adds necessary peer dependencies, and handles monorepos. It is a one-time migration tool, not a general Babel upgrade utility.