- Got https://github.com/brettcannon/check-for-changed-files/tree/rewrite/mjs running (required moving to [Vitest](https://vitest.dev/) for proper ECMAScript module support) - Learned that https://node.green/ is officially the way to figure out what ECMAScript version a Node version supports (e.g., Node 20 covers es2023) - Learned how to config ESLint for the ECMAScript and Node version by [specifying the environment](https://eslint.org/docs/latest/use/configure/language-options#specifying-environments) and [parser options](https://eslint.org/docs/latest/use/configure/language-options#specifying-parser-options) for the ECMAScript version in `.estlint.json` and the Node version in `"engines"` for `package.json`