diff --git a/.github/workflows/source-export.yml b/.github/workflows/source-export.yml
new file mode 100644
index 00000000..e003f683
--- /dev/null
+++ b/.github/workflows/source-export.yml
@@ -0,0 +1,25 @@
+name: Source export
+
+on:
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  export:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+      - name: Create source archive
+        run: tar --exclude=.git -czf "$RUNNER_TEMP/agent-runtime-source.tgz" .
+      - name: Upload source archive
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: agent-runtime-source
+          path: ${{ runner.temp }}/agent-runtime-source.tgz
+          if-no-files-found: error
+          compression-level: 0