diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 00000000..3e2025f7
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,143 @@
+name: Tests
+
+on:
+  push:
+    branches: [develop, main]
+  pull_request:
+    branches: [develop, main]
+  workflow_dispatch:
+
+env:
+  PYTHON_VERSION: "3.14"
+  NODE_VERSION: "24"
+
+jobs:
+  backend:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: backend
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v8.1.0
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+
+      - name: Install dependencies
+        run: uv sync --frozen
+
+      - name: Run tests
+        run: uv run pytest --junitxml=report.xml --cov=app --cov-report=term-missing
+
+      - name: Upload report
+        if: always()
+        uses: actions/upload-artifact@v7
+        with:
+          name: test-report-backend
+          path: backend/report.xml
+
+  cli:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: cli
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v8.1.0
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+
+      - name: Install dependencies
+        run: uv sync --frozen
+
+      - name: Run tests
+        run: uv run pytest --junitxml=report.xml
+
+      - name: Upload report
+        if: always()
+        uses: actions/upload-artifact@v7
+        with:
+          name: test-report-cli
+          path: cli/report.xml
+
+  frontend:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: frontend
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: npm
+          cache-dependency-path: frontend/package-lock.json
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npx vitest run --reporter=junit --reporter=default --outputFile=report.xml
+
+      - name: Upload report
+        if: always()
+        uses: actions/upload-artifact@v7
+        with:
+          name: test-report-frontend
+          path: frontend/report.xml
+
+  report:
+    needs: [backend, cli, frontend]
+    if: always()
+    runs-on: ubuntu-latest
+    permissions:
+      checks: write
+      pull-requests: write
+    steps:
+      - uses: actions/download-artifact@v8
+        with:
+          path: artifacts
+
+      - name: Initialize git for test reporter
+        run: |
+          git init
+          git config user.email "ci@github.com"
+          git config user.name "CI"
+          git add -A
+          git commit --allow-empty -m "ci"
+
+      - name: Publish test results
+        id: results
+        uses: dorny/test-reporter@v3
+        with:
+          name: Test Results
+          path: "artifacts/**/report.xml"
+          reporter: java-junit
+          fail-on-error: "false"
+
+      - name: Post PR comment
+        if: github.event_name == 'pull_request'
+        uses: actions/github-script@v9
+        with:
+          script: |
+            const passed = parseInt('${{ steps.results.outputs.passed }}');
+            const failed = parseInt('${{ steps.results.outputs.failed }}');
+            const skipped = parseInt('${{ steps.results.outputs.skipped }}');
+            const conclusion = '${{ steps.results.outputs.conclusion }}';
+            const total = passed + failed + skipped;
+            const emoji = conclusion === 'success' ? '✅' : '❌';
+            const sha = context.sha;
+            const shaLink = `[\`${sha.slice(0, 7)}\`](${context.serverUrl}/${context.repo.owner}/${context.repo.repo}/commit/${sha})`;
+            const summary = `${emoji} **Test Results** — ${passed} passed, ${failed} failed, ${skipped} skipped (${total} total) — ${shaLink}`;
+            await github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: summary,
+            });