eslint.config.mjs

import nextCoreWebVitals from 'eslint-config-next/core-web-vitals';
import nextTypeScript from 'eslint-config-next/typescript';
import eslintConfigPrettier from 'eslint-config-prettier';

// ESLint 10 flat config. eslint-config-next 16 ships native flat configs, so we
// compose them directly instead of wrapping legacy .eslintrc via FlatCompat
// (which crashes on the react plugin's circular flat-config object). Rule set is
// carried over verbatim from the previous .eslintrc.json.
const eslintConfig = [
  {
    ignores: [
      'node_modules/',
      '.next/',
      'next-env.d.ts',
      'dist/',
      'build/',
      'coverage/',
      '*.config.js',
      '*.config.mjs',
      'healthcheck.js',
      'scripts/',
    ],
  },
  ...nextCoreWebVitals,
  ...nextTypeScript,
  {
    // eslint-plugin-react's version:'detect' calls context.getFilename, removed
    // in ESLint 10 — pin the React major so detection never runs. Must come
    // AFTER the next configs, which set version:'detect'.
    settings: { react: { version: '19' } },
  },
  // Must come after the configs it disables formatting rules from.
  eslintConfigPrettier,
  {
    rules: {
      '@typescript-eslint/no-unused-vars': [
        'error',
        // caughtErrors:'none' preserves the pre-upgrade contract — @typescript-eslint
        // v8 flipped the default from 'none' to 'all', which would newly flag every
        // unused `catch (err)` binding. Not a real regression; keep prior behaviour.
        { argsIgnorePattern: '^_', varsIgnorePattern: '^_', caughtErrors: 'none' },
      ],
      '@typescript-eslint/no-explicit-any': 'warn',
      '@typescript-eslint/explicit-function-return-type': 'off',
      '@typescript-eslint/explicit-module-boundary-types': 'off',
      '@typescript-eslint/no-empty-function': 'warn',
      '@typescript-eslint/no-require-imports': 'off',
      'no-console': ['error', { allow: ['warn', 'error', 'info'] }],
      'prefer-const': 'error',
      'no-var': 'error',
      'react/no-unescaped-entities': 'off',
      'react/display-name': 'off',
      '@next/next/no-img-element': 'warn',
    },
  },
];

export default eslintConfig;