checkout/eslint.config.mjs

import github from 'eslint-plugin-github'
import jest from 'eslint-plugin-jest'

const githubConfigs = github.getFlatConfigs()

export default [
  {
    ignores: ['**/node_modules/**', '**/lib/**', '**/dist/**']
  },
  githubConfigs.recommended,
  ...githubConfigs.typescript,
  {
    files: ['**/*.ts'],
    languageOptions: {
      parserOptions: {
        project: './tsconfig.json'
      }
    },
    rules: {
      'eslint-comments/no-use': 'off',
      'import/no-namespace': 'off',
      'no-unused-vars': 'off',
      '@typescript-eslint/no-unused-vars': 'error',
      '@typescript-eslint/explicit-member-accessibility': [
        'error',
        {accessibility: 'no-public'}
      ],
      '@typescript-eslint/no-require-imports': 'error',
      '@typescript-eslint/array-type': 'error',
      '@typescript-eslint/await-thenable': 'error',
      camelcase: 'off',
      '@typescript-eslint/explicit-function-return-type': [
        'error',
        {allowExpressions: true}
      ],
      '@typescript-eslint/no-array-constructor': 'error',
      '@typescript-eslint/no-explicit-any': 'error',
      '@typescript-eslint/no-extraneous-class': 'error',
      '@typescript-eslint/no-floating-promises': 'error',
      '@typescript-eslint/no-for-in-array': 'error',
      '@typescript-eslint/no-inferrable-types': 'error',
      '@typescript-eslint/no-misused-new': 'error',
      '@typescript-eslint/no-namespace': 'error',
      '@typescript-eslint/no-non-null-assertion': 'warn',
      '@typescript-eslint/no-unnecessary-qualifier': 'error',
      '@typescript-eslint/no-unnecessary-type-assertion': 'error',
      '@typescript-eslint/no-useless-constructor': 'error',
      '@typescript-eslint/prefer-for-of': 'warn',
      '@typescript-eslint/prefer-function-type': 'warn',
      '@typescript-eslint/prefer-includes': 'error',
      '@typescript-eslint/prefer-string-starts-ends-with': 'error',
      '@typescript-eslint/promise-function-async': 'error',
      '@typescript-eslint/require-array-sort-compare': 'error',
      '@typescript-eslint/restrict-plus-operands': 'error',
      '@typescript-eslint/unbound-method': 'error'
    }
  },
  {
    files: ['__test__/**/*.ts'],
    ...jest.configs['flat/recommended']
  }
]