build(lint) replace xo with biome

.github/workflows/test.yml

@@ -1,4 +1,4 @@
-name: Test
+name: CI
 
 on:
   pull_request:
@@ -9,6 +9,31 @@ on:
       - main
 
 jobs:
+  lint:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10.14.0
+
+      - name: Use Node.js 22.x
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22.x
+          cache: 'pnpm'
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Check formatting and linting
+        run: pnpm lint
+
   test:
     runs-on: ubuntu-latest
     strategy:
@@ -32,8 +57,5 @@ jobs:
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
-      - name: Run linter
-        run: pnpm lint
-
       - name: Run tests
         run: pnpm test

biome.json

@@ -0,0 +1,63 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.4.10/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true
+  },
+  "files": {
+    "ignoreUnknown": false,
+    "includes": ["**", "!**/scratch", "!**/node_modules", "!**/output", "!**/coverage"]
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 100
+  },
+  "assist": { "actions": { "source": { "organizeImports": "on" } } },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true,
+      "correctness": {
+        "noUnusedFunctionParameters": "warn",
+        "noUnusedVariables": "warn",
+        "noUnusedImports": "warn",
+        "noUnsafeFinally": "warn",
+        "useYield": "warn",
+        "noInvalidUseBeforeDeclaration": "warn"
+      },
+      "complexity": {
+        "useLiteralKeys": "warn",
+        "useOptionalChain": "warn",
+        "noStaticOnlyClass": "warn"
+      },
+      "style": {
+        "useBlockStatements": "off",
+        "useTemplate": "warn",
+        "useConst": "warn"
+      },
+      "suspicious": {
+        "noAssignInExpressions": "warn",
+        "noAsyncPromiseExecutor": "warn",
+        "noTemplateCurlyInString": "warn",
+        "noControlCharactersInRegex": "warn",
+        "useIterableCallbackReturn": "warn",
+        "useAdjacentOverloadSignatures": "warn",
+        "noShadowRestrictedNames": "warn"
+      },
+      "performance": {
+        "noDynamicNamespaceImportAccess": "warn"
+      }
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "single",
+      "semicolons": "always",
+      "trailingCommas": "none",
+      "arrowParentheses": "asNeeded"
+    }
+  }
+}

package.json

@@ -9,8 +9,8 @@
   },
   "scripts": {
     "test": "node --test test/*.test.js",
-    "lint": "xo",
-    "lint:fix": "xo --fix",
+    "lint": "biome check",
+    "lint:fix": "biome check --fix",
     "changeset": "changeset"
   },
   "keywords": [
@@ -41,7 +41,7 @@
     "undici": "^7.13.0"
   },
   "devDependencies": {
-    "@changesets/cli": "^2.29.5",
-    "xo": "^1.2.1"
+    "@biomejs/biome": "^2.4.10",
+    "@changesets/cli": "^2.29.5"
   }
 }