diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 00000000..15301308
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,75 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+  schedule:
+    - cron: '0 6 * * 1'  # Weekly Monday 6am UTC
+
+permissions:
+  contents: read
+  actions: read
+  security-events: write
+
+env:
+  GOPRIVATE: github.com/GoCodeAlone/*
+  GONOSUMCHECK: github.com/GoCodeAlone/*
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      contents: read
+      packages: read
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - language: go
+            build-mode: autobuild
+          - language: javascript-typescript
+            build-mode: none
+          - language: actions
+            build-mode: none
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Set up Go
+      if: matrix.language == 'go'
+      uses: actions/setup-go@v5
+      with:
+        go-version: '1.26'
+        cache: true
+
+    - name: Set up Node.js
+      if: matrix.language == 'go'
+      uses: actions/setup-node@v4
+      with:
+        node-version: '20'
+        registry-url: 'https://npm.pkg.github.com'
+        cache: 'npm'
+        cache-dependency-path: ui/package-lock.json
+
+    - name: Build UI assets
+      if: matrix.language == 'go'
+      run: cd ui && npm ci && npm run build
+      env:
+        NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v4
+      with:
+        languages: ${{ matrix.language }}
+        build-mode: ${{ matrix.build-mode }}
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v4
+      with:
+        category: "/language:${{ matrix.language }}"