diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 482af0b..554d479 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,3 +32,13 @@ jobs:
         with:
           node-version: latest
       - run: npm run bench
+
+  prettier:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - uses: actions/setup-node@v7
+        with:
+          node-version: latest
+      - run: npm ci
+      - run: npm run format:check
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c2658d7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules/
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..dd44972
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1 @@
+*.md
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..fa26e29
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,35 @@
+{
+  "name": "@nodejs/microtel",
+  "version": "0.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "@nodejs/microtel",
+      "version": "0.0.0",
+      "license": "MIT",
+      "devDependencies": {
+        "prettier": "3.9.10"
+      },
+      "engines": {
+        "node": ">=26.9.0"
+      }
+    },
+    "node_modules/prettier": {
+      "version": "3.9.10",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.9.10.tgz",
+      "integrity": "sha512-skGHTH1Yb9QvaTC4hWnRTzEYtCpApF0UMBPz+t/0ZPzP8ihefo/btKd+QA7pUE0fEwA1SbS/NmhyEcstdXOIdA==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "prettier": "bin/prettier.cjs"
+      },
+      "engines": {
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://github.com/prettier/prettier?sponsor=1"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
index 53dc02c..d15c0c0 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,10 @@
   },
   "scripts": {
     "test": "node --test 'test/test-*.js'",
-    "bench": "node --experimental-bench --bench 'benchmark/*.bench.js'"
+    "bench": "node --experimental-bench --bench 'benchmark/*.bench.js'",
+    "format:check": "prettier --check ."
+  },
+  "devDependencies": {
+    "prettier": "3.9.10"
   }
 }