Edit: typescript-eslint@>=v7 supports ESLint flat config! See: https://typescript-eslint.io/blog/announcing-typescript-eslint-v7

Overview

ESLint is adding an exciting new config system called "flat" configs:

• Configuration files docs: https://eslint.org/docs/latest/use/configure/configuration-files-new
• Configuration migration guide: https://eslint.org/docs/latest/use/configure/migration-guide

@typescript-eslint/eslint-plugin does not yet officially support ESLint flat configs. We'd certainly like it to soon. But doing so is a nontrivial in-progress task and isn't done yet. Flat configs with TypeScript code may work in your specific project. They may not.

Tracking references:

• feat: add types for flat config files #7273: adding type definitions to work with well-typed flat config files
• Change Request: document flat configs in plugins eslint/eslint#17242: upstream ESLint issue for adding the docs we need to know how to provide support
• feat: add support for flat configs #7935: adds support for flat config files to our tooling

If you're filing a complex / configuration issue on typescript-eslint, for now, please make sure you're using traditional ESLint configs. We'll post back in this issue once we can officially provide support for using @typescript-eslint/eslint-plugin with flat configs.