Remove @eslint/compat compatibility layer

.gitignore

@@ -1 +1,2 @@
 node_modules
+package-lock.json

configs/javascript.js

@@ -1,4 +1,3 @@
-import { fixupPluginRules } from '@eslint/compat';
 import stylisticEslint from '@stylistic/eslint-plugin';
 import _import from 'eslint-plugin-import';
 
@@ -76,8 +75,8 @@ const jsRules = {
 
 export default {
 	plugins: {
-		'@stylistic': fixupPluginRules(stylisticEslint),
-		import: fixupPluginRules(_import),
+		'@stylistic': stylisticEslint,
+		import: _import,
 	},
 	settings: {
 		/** @see https://github.com/import-js/eslint-plugin-import/issues/2556#issuecomment-1419518561 */

configs/recommended.js

@@ -1,29 +1,11 @@
-import path from 'node:path';
-import { fileURLToPath } from 'node:url';
-import { fixupConfigRules } from '@eslint/compat';
-import { FlatCompat } from '@eslint/eslintrc';
 import js from '@eslint/js';
+import typescriptEslint from '@typescript-eslint/eslint-plugin';
 import javascript from './javascript.js';
 import typescript from './typescript.js';
 
-const __filename = fileURLToPath(import.meta.url);
-const __dirname = path.dirname(__filename);
-const compat = new FlatCompat({
-	baseDirectory: __dirname,
-	recommendedConfig: js.configs.recommended,
-	allConfig: js.configs.all,
-});
-
 export default [
-	...fixupConfigRules(compat.extends(
-		'eslint:recommended',
-		'plugin:@typescript-eslint/recommended',
-		// TODO: 有効にすると .ts ファイルで import したときに
-		//       parserPath or languageOptions.parser is required!
-		//       と出るので以下を無効化しておく
-		// 'plugin:import/recommended',
-		'plugin:import/typescript',
-	)),
+	js.configs.recommended,
+	...typescriptEslint.configs['flat/recommended'],
 	{
 		files: ['**/*.js', '**/*.cjs', '**/*.mjs', '**/*.jsx'],
 		...javascript,

configs/typescript.js

@@ -1,7 +1,6 @@
 import typescriptEslint from '@typescript-eslint/eslint-plugin';
 import stylisticEslint from '@stylistic/eslint-plugin';
 import tsParser from '@typescript-eslint/parser';
-import { fixupPluginRules } from '@eslint/compat';
 import _import from 'eslint-plugin-import';
 import javascript from './javascript.js';
 
@@ -47,9 +46,9 @@ const tsRules = {
 
 export default {
 	plugins: {
-		'@typescript-eslint': fixupPluginRules(typescriptEslint),
-		'@stylistic': fixupPluginRules(stylisticEslint),
-		import: fixupPluginRules(_import),
+		'@typescript-eslint': typescriptEslint,
+		'@stylistic': stylisticEslint,
+		import: _import,
 	},
 	languageOptions: {
 		parser: tsParser,

package.json

@@ -21,7 +21,6 @@
     "misskey"
   ],
   "peerDependencies": {
-    "@eslint/compat": ">= 1",
     "@eslint/js": ">= 9",
     "@stylistic/eslint-plugin": ">= 5",
     "@typescript-eslint/eslint-plugin": ">= 8",
@@ -31,7 +30,6 @@
     "globals": ">= 16"
   },
   "devDependencies": {
-    "@eslint/compat": "^1.4.1",
     "@eslint/js": "^9.39.0",
     "@stylistic/eslint-plugin": "^5.5.0",
     "@types/node": "^24.9.2",