eslint.config.mjs

import { fixupConfigRules, fixupPluginRules } from '@eslint/compat';
import typescriptEslint from '@typescript-eslint/eslint-plugin';
import _import from 'eslint-plugin-import';
import tsParser from '@typescript-eslint/parser';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import js from '@eslint/js';
import { FlatCompat } from '@eslint/eslintrc';

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

export default [
  {
    ignores: ['**/dist/', '**/*.mjs', '**/*.js']
  },
  ...fixupConfigRules(
    compat.extends(
      'eslint:recommended',
      'plugin:@typescript-eslint/recommended',
      'plugin:import/recommended',
      'plugin:import/typescript'
    )
  ),
  {
    plugins: {
      '@typescript-eslint': fixupPluginRules(typescriptEslint),
      import: fixupPluginRules(_import)
    },
    languageOptions: {
      parser: tsParser,
      ecmaVersion: 5,
      sourceType: 'script',
      parserOptions: {
        project: ['./tsconfig.json']
      }
    },
    rules: {
      'no-duplicate-imports': 'error',
      'import/no-unresolved': 'off',
      '@typescript-eslint/naming-convention': [
        'error',
        {
          selector: ['variable', 'function'],
          format: ['snake_case', 'UPPER_CASE']
        },
        {
          selector: 'class',
          format: ['PascalCase']
        }
      ]
    }
  }
];