chore: add biome for linting and formatting

Author: ahonn

.github/workflows/release.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
-      - name: Lint
+      - name: Lint and format check
         run: pnpm run lint
 
       - name: Build

.releaserc.json

@@ -14,4 +14,4 @@
     ],
     "@semantic-release/github"
   ]
-}
+}

biome.json

@@ -0,0 +1,50 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.2.2/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true
+  },
+  "files": {
+    "ignoreUnknown": false
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true,
+      "complexity": {
+        "noExcessiveCognitiveComplexity": "off"
+      },
+      "correctness": {
+        "noUnusedVariables": "error"
+      },
+      "style": {
+        "useConst": "error",
+        "useConsistentArrayType": "error"
+      },
+      "suspicious": {
+        "noExplicitAny": "off"
+      }
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "single",
+      "semicolons": "always",
+      "trailingCommas": "all"
+    }
+  },
+  "assist": {
+    "enabled": true,
+    "actions": {
+      "source": {
+        "organizeImports": "on"
+      }
+    }
+  }
+}

package.json

@@ -11,7 +11,9 @@
     "build": "tsc",
     "dev": "tsc --watch",
     "start": "node build/index.js",
-    "lint": "eslint src/**/*.ts",
+    "lint": "biome check .",
+    "lint:fix": "biome check --write .",
+    "format": "biome format --write .",
     "clean": "rm -rf build",
     "prepublishOnly": "npm run clean && npm run build",
     "dxt:build": "npm run clean && npm run build",
@@ -37,13 +39,11 @@
   },
   "devDependencies": {
     "@anthropic-ai/dxt": "^0.2.6",
+    "@biomejs/biome": "^2.2.2",
     "@semantic-release/changelog": "^6.0.3",
     "@semantic-release/git": "^10.0.1",
     "@types/mime-types": "^2.1.4",
     "@types/node": "^22.10.5",
-    "@typescript-eslint/eslint-plugin": "^8.18.2",
-    "@typescript-eslint/parser": "^8.18.2",
-    "eslint": "^9.17.0",
     "semantic-release": "^24.2.7",
     "typescript": "^5.7.3"
   },