From f53561e603cfc7c5acf0ff8a9a57a2dd833ebb04 Mon Sep 17 00:00:00 2001
From: aoi-dev-0411 <aoikabu12@gmail.com>
Date: Sat, 11 Apr 2026 17:21:34 +0900
Subject: [PATCH] feat: setup ESLint flat config with TypeScript and Next.js
 rules

Closes #28
---
 eslint.config.mjs | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 eslint.config.mjs

diff --git a/eslint.config.mjs b/eslint.config.mjs
new file mode 100644
index 0000000..e005ed8
--- /dev/null
+++ b/eslint.config.mjs
@@ -0,0 +1,30 @@
+import { dirname } from "path";
+import { fileURLToPath } from "url";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+});
+
+const eslintConfig = [
+  ...compat.extends("next/core-web-vitals", "next/typescript"),
+  {
+    rules: {
+      "no-unused-vars": "off",
+      "@typescript-eslint/no-unused-vars": [
+        "warn",
+        { argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
+      ],
+      "@typescript-eslint/no-explicit-any": "warn",
+      "no-console": ["warn", { allow: ["warn", "error"] }],
+      "prefer-const": "error",
+      "no-var": "error",
+      eqeqeq: ["error", "always"],
+    },
+  },
+];
+
+export default eslintConfig;