diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..527b2c3
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,40 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: '17 4 * * 1'
+
+permissions:
+  contents: read
+  security-events: write
+
+concurrency:
+  group: codeql-${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  analyze:
+    name: CodeQL (JavaScript/TypeScript)
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - name: Checkout source without persisted credentials
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+          fetch-depth: 0
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@e429ea58a9912cadc53f8132ad35562b54de1b30 # v3.38.1
+        with:
+          languages: javascript-typescript
+          build-mode: none
+
+      - name: Analyze
+        uses: github/codeql-action/analyze@e429ea58a9912cadc53f8132ad35562b54de1b30 # v3.38.1
+        with:
+          category: /language:javascript-typescript