diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..baaef9f
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,52 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Enable Corepack
+        run: corepack enable
+
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "dir=$(yarn config get cacheFolder)" >> $GITHUB_OUTPUT
+
+      - name: Cache dependencies
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+
+      - name: Install dependencies
+        run: yarn install --immutable
+
+      - name: Type check
+        run: yarn check
+
+      - name: Lint
+        run: yarn lint
+
+      - name: Build
+        run: yarn build
+        env:
+          PUBLIC_WEB_DOMAIN: "www.cannorin.net"
+          PUBLIC_WEB_TURNSTILE_SITEKEY: "1x00000000000000000000BB"
+          WEB_TURNSTILE_SECRET_KEY: "1x0000000000000000000000000000000AA"
+          MISSKEY_API_KEY: "dummy"