diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 00000000..4a469da1
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,64 @@
+name: CodeQL
+
+on:
+  push:
+    branches:
+      - main
+  schedule:
+    # Runs every Monday at 00:00 UTC.
+    - cron: "0 0 * * 1"
+  workflow_dispatch:
+
+permissions:
+  security-events: write
+  actions: read
+  contents: read
+
+concurrency:
+  group: codeql-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - language: actions
+            build-mode: none
+          - language: java-kotlin
+            build-mode: manual
+          - language: javascript-typescript
+            build-mode: none
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up JDK 17
+        if: matrix.language == 'java-kotlin'
+        uses: actions/setup-java@v4
+        with:
+          java-version: 17
+          distribution: zulu
+          cache: gradle
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: ${{ matrix.language }}
+          build-mode: ${{ matrix.build-mode }}
+
+      - name: Manual build (Java/Kotlin)
+        if: matrix.language == 'java-kotlin'
+        run: ./gradlew assemble --no-daemon
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v4
+        with:
+          category: "/language:${{ matrix.language }}"