bug(types): Typing files are missing for tseslint.configs.strictTypeChecked in FlatConfig

[motss]

Describe the bug

I'm trying to use ESLint's new FlatConfig and typescript-eslint's tseslint.configs.strictTypeChecked enabled for stricter type checking and linting. However, ESLint reports the lint error below for eslint-plugin-perfectionist due to missing types from the package:

  20:3   error  Unsafe argument of type `any` assigned to a parameter of type `ConfigWithExtends`  @typescript-eslint/no-unsafe-argument

I was quite surprised that a project that is entirely written in TypeScript chose to omit type files completely. It'd be great if type files could be added so that ESLint read the typings of the package correctly without the need to add additional rule to turn off some rules in eslint.config.*js for all the users.

Code example

1. Go to https://stackblitz.com/edit/vitest-dev-vitest-c5wksh?file=eslint.config.mjs
2. Wait for dependencies to be installed and you will see linting errors
3. If Step 2 fails, you can manually run pnpm install && pnpm lint

ESLint version

9.1.1

ESLint Plugin Perfectionist version

2.10.0

Additional comments

{
"@eslint/eslintrc": "^3.0.2",
"@eslint/js": "^9.1.1",
"eslint": "^9.1.1",
"eslint-plugin-perfectionist": "^2.10.0",
"typescript-eslint": "^7.7.1"
}

Validations

• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.

[azat-io]

Thank you for your question! We plan to add type support in the next major version.