eslint.config.js

import { defineConfig } from 'eslint/config';

import js from '@eslint/js';
import typescriptEslint from '@typescript-eslint/eslint-plugin';
import tsParser from '@typescript-eslint/parser';
import react from 'eslint-plugin-react';

import { FlatCompat } from '@eslint/eslintrc';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const compat = new FlatCompat({
  baseDirectory: path.dirname(fileURLToPath(import.meta.url)),
  recommendedConfig: js.configs.recommended,
  allConfig: js.configs.all,
});

export default defineConfig([
  {
    ignores: ['dist/**'],
  },
  {
    languageOptions: {
      parser: tsParser,
    },

    plugins: {
      '@typescript-eslint': typescriptEslint,
      react,
    },

    extends: compat.extends('eslint:recommended', 'plugin:@typescript-eslint/recommended', 'plugin:react/recommended'),

    settings: {
      react: {
        version: 'detect',
      },
    },

    rules: {
      'react/react-in-jsx-scope': 'off',
      '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_', varsIgnorePattern: '^_' }],
    },
  },
  // Node/CommonJS overrides for config files
  {
    files: ['**/*.config.js', '*.config.js', '**/*.cjs', '*.cjs', 'eslint.config.js', '.prettierrc.js'],
    ignores: ['eslint.config.js'],
    languageOptions: {
      sourceType: 'commonjs',
      globals: {
        module: 'readonly',
        require: 'readonly',
        __dirname: 'readonly',
        process: 'readonly',
      },
    },
  },
  // Test files: relax some TypeScript strictness for ergonomics
  {
    files: ['tests/**/*.ts', 'tests/**/*.tsx', '**/*.test.ts', '**/*.test.tsx', 'tests/setup.ts'],
    languageOptions: {
      parser: tsParser,
    },
    rules: {
      '@typescript-eslint/no-explicit-any': 'off',
      '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_', varsIgnorePattern: '^_' }],
    },
  },
]);