diff --git a/.github/workflows/verify.yml b/.github/workflows/verify.yml
new file mode 100644
index 0000000..6edab90
--- /dev/null
+++ b/.github/workflows/verify.yml
@@ -0,0 +1,29 @@
+name: verify
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18.x
+
+      - name: Cache node_modules
+        uses: actions/cache@v3
+        with:
+          path: node_modules
+          key: v1-${{ runner.os }}-${{ hashFiles('yarn.lock') }}
+
+      - name: Run yarn install
+        run: yarn install --frozen-lockfile
+
+      - name: Run verify
+        run: yarn verify
diff --git a/package.json b/package.json
index ab87957..8c1442e 100644
--- a/package.json
+++ b/package.json
@@ -5,11 +5,11 @@
   "scripts": {
     "build": "tsup",
     "lint": "eslint ." ,
-    "typecheck": "tsc -p tsconfig.json" ,
+    "typecheck": "rm -rf _tsout && tsc -p tsconfig.lib.json && tsc -p tsconfig.test.json && tsc -p tsconfig.json" ,
     "verify": "yarn build && yarn test && yarn lint && yarn typecheck" ,
     "dev": "tsup --watch",
     "test": "jest",
-    "clean": "rm -rf dist node_modules"
+    "clean": "rm -rf dist node_modules _tsout"
   },
   "main": "dist/index.js",
   "types": "./dist/index.d.ts",