ci: add linting to CI pipeline

.github/workflows/lint.yml

@@ -0,0 +1,27 @@
+name: lint
+
+on:
+  push:
+    branches: ["main", "master"]
+  pull_request:
+    branches: ["main", "master"]
+
+jobs:
+  eslint:
+    runs-on: ubuntu-latest
+    name: ESLint
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Lint
+        run: npm run lint

eslint.config.js

@@ -0,0 +1,14 @@
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  {
+    ignores: ['build/**', 'node_modules/**'],
+  },
+  ...tseslint.configs.recommended,
+  {
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'warn',
+      '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
+    },
+  }
+)

package.json

@@ -19,6 +19,7 @@
   ],
   "scripts": {
     "build": "tsc",
+    "lint": "eslint .",
     "test": "npx tsx --test tests/**/*.test.ts",
     "prepublishOnly": "npm run build"
   },
@@ -27,8 +28,10 @@
   },
   "devDependencies": {
     "@types/node": "^20.19.37",
+    "eslint": "^9.0.0",
     "tsx": "^4.21.0",
-    "typescript": "^5.9.3"
+    "typescript": "^5.9.3",
+    "typescript-eslint": "^8.0.0"
   },
   "license": "MIT"
 }