eslint.config.ts

import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';
import react from 'eslint-plugin-react';
import reactHooks from 'eslint-plugin-react-hooks';

export default tseslint.config(
  {
    ignores: ['dist/**', 'index.ts', 'eslint.config.ts', 'vite.config.ts'],
  },
  eslint.configs.recommended,
  ...tseslint.configs.strictTypeChecked,
  ...tseslint.configs.stylisticTypeChecked,
  {
    languageOptions: {
      parserOptions: {
        projectService: true,
        tsconfigRootDir: import.meta.dirname,
      },
    },
    rules: {
      // --- 厳格な型安全 ---
      '@typescript-eslint/no-explicit-any': 'error',
      '@typescript-eslint/no-unsafe-assignment': 'error',
      '@typescript-eslint/no-unsafe-call': 'error',
      '@typescript-eslint/no-unsafe-member-access': 'error',
      '@typescript-eslint/no-unsafe-return': 'error',
      '@typescript-eslint/no-unsafe-argument': 'error',
      '@typescript-eslint/strict-boolean-expressions': 'error',
      '@typescript-eslint/no-non-null-assertion': 'error',
      '@typescript-eslint/consistent-type-imports': ['error', { prefer: 'type-imports' }],
      '@typescript-eslint/no-import-type-side-effects': 'error',

      // --- 未使用コード検出 ---
      '@typescript-eslint/no-unused-vars': [
        'error',
        {
          argsIgnorePattern: '^_',
          varsIgnorePattern: '^_',
        },
      ],

      // --- asキャスト禁止（Branded Types強制） ---
      '@typescript-eslint/consistent-type-assertions': [
        'error',
        {
          assertionStyle: 'never',
        },
      ],

      // --- その他 ---
      '@typescript-eslint/no-floating-promises': 'error',
      '@typescript-eslint/await-thenable': 'error',
      '@typescript-eslint/require-await': 'error',
      'no-console': ['warn', { allow: ['warn', 'error'] }],
      eqeqeq: ['error', 'always'],
    },
  },
  {
    files: ['src/client/**/*.{ts,tsx}'],
    plugins: { react, 'react-hooks': reactHooks },
    rules: {
      ...reactHooks.configs.recommended.rules,
      'react/jsx-no-leaked-render': 'error',
    },
  },
);