ESLint Config inspector fails to load with `eslint-plugin-mdx`

[Simek]

Initial checklist

• I read the support docs
• I read the contributing guide
• I agree to follow the code of conduct
• I searched issues and discussions and couldn’t find anything (or linked relevant results below)

Affected package

eslint-plugin-mdx

Steps to reproduce

1. Check out https://github.com/facebook/react-native-website.
2. Run npx eslint --inspect-config at the root to see the failure.
3. Comment out eslint-plugin-mdx import and its usages in eslint.config.js:

   import * as eslintPluginMdx from 'eslint-plugin-mdx';
   
   [...]
   
   ...eslintPluginMdx.flat,
   processor: eslintPluginMdx.createRemarkProcessor({
     lintCodeBlocks: false,
     remarkConfigPath: 'website/.remarkrc.mjs',
   }),

4. Re-run npx eslint --inspect-config, it should work now.

Refs:

• Config inspector fails to load with eslint-plugin-mdx eslint/config-inspector#201

Actual behavior

ESLint Inspect Config tool fails to load the config which use eslint-plugin-mdx:

Failed to load eslint.config.js
Error: Could not find ESLint Linter in require cache
    at file:///W:/GitHub/react-native-website/node_modules/eslint-plugin-mdx/lib/processors/options.js:5:11
    at ModuleJob.run (node:internal/modules/esm/module_job:377:25)
    at async onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:671:26)
    at async extractResult (file:///C:/Users/Simek/AppData/Local/npm-cache/_npx/fadb285f08a830ab/node_modules/bundle-require/dist/index.js:169:15)
    at async run (file:///C:/Users/Simek/AppData/Local/npm-cache/_npx/fadb285f08a830ab/node_modules/bundle-require/dist/index.js:211:17)

I look like the require cache check is a the root of the issue:

• https://github.com/mdx-js/eslint-mdx/blob/master/packages/eslint-plugin-mdx/src/processors/options.ts#L14-L22

Expected behavior

ESLint Inspect Config should be able to load the config, and start correctly.

Runtime

node@22.21.1 and node@24.11.1

Package manager

yarn@4.12.0

Operating system

OS agnostic (tested on macOS and Windows)

Build and bundle tools

Docusaurus