Bug: "Type 'typeof plugin' is not assignable to type 'Plugin'."

[Janpot]

Environment

ESLint version: 9.39.0
@eslint/json version: 0.13.2
Node version: v20.19.1
npm version: 10.8.2
Operating System: Stackblitz webcontainer

Which language are you using?

json

What did you do?

Just as from the README

Configuration

import { defineConfig } from 'eslint/config';
import json from '@eslint/json';

/**
 * @returns {import('eslint').Linter.Config[]}
 */
export function createJsonConfig() {
  return defineConfig([
    {
      name: 'JSON files',
      files: ['**/*.json'],
      ignores: ['package-lock.json'],
      plugins: { json },
      language: 'json/json',
      extends: [json.configs.recommended],
    },

    {
      name: 'JSONC files',
      files: [
        '**/*.jsonc',
        '**/tsconfig.json',
        '**/tsconfig.*.json',
        '.vscode/**/*.json',
        'renovate.json',
      ],
      plugins: { json },
      language: 'json/jsonc',
      extends: [json.configs.recommended],
    },

    {
      name: 'JSON5 files',
      files: ['**/*.json5'],
      plugins: { json },
      language: 'json/json5',
      extends: [json.configs.recommended],
    },
  ]);
}

What did you expect to happen?

no typescript errors

What actually happened?

Typescript error

eslint.config.mjs:7:7 - error TS2322: Type 'typeof plugin' is not assignable to type 'Plugin'.
  Types of property 'rules' are incompatible.

See https://stackblitz.com/edit/stackblitz-starters-4dbwc63k

Link to Minimal Reproducible Example

https://stackblitz.com/edit/stackblitz-starters-4dbwc63k

Participation

• I am willing to submit a pull request for this issue.

Additional comments

We ran into this at mui/mui-public#774

[lumirlumir]

Hi @Janpot — thanks for opening this issue.

I can reproduce the bug, and it appears to be the same error we're tracking in the Markdown plugin: eslint/markdown#577

This happens because of the newly released @eslint/core@0.17.0. eslint@9.39.0 now depends on @eslint/core@0.17.0, while @eslint/json@0.13.2 depends on @eslint/core@0.15.2, so the @eslint/core version mismatch is causing the issue (the type constraints changed slightly in @eslint/core@0.17.0).

A PR that bumps @eslint/core to 0.17.0 has already been merged; publishing a new release should resolve this.

This is a known issue, so I'm marking it as accepted for tracking in the JSON plugin.

---

If you need a hotfix for this issue, you can add an overrides field to your project's root package.json, like this:

  "overrides": {
    "@eslint/core": "^0.17.0"
  }

[nzakas]

I just published a new release. Please upgrade and see if the problem is resolved.

[Janpot]

Confirmed that it works. Thank you 🙏