diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
new file mode 100644
index 0000000..b2ab416
--- /dev/null
+++ b/.github/workflows/integration.yml
@@ -0,0 +1,123 @@
+name: Cross-Repo Integration
+
+on:
+    pull_request:
+    push:
+        branches: [master]
+    workflow_dispatch:
+
+concurrency:
+    group: protocol-integration-${{ github.event.pull_request.number || github.ref }}
+    cancel-in-progress: true
+
+jobs:
+    package-protocol:
+        name: Package Protocol (tgz)
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout repo
+              uses: actions/checkout@v4
+
+            - name: Setup NodeJS
+              uses: actions/setup-node@v4
+              with:
+                  node-version: 24
+
+            - name: Install deps & build
+              run: |
+                  npm ci
+                  npm run build
+
+            - name: Pack Protocol
+              run: npm pack
+
+            - name: Upload Package
+              uses: actions/upload-artifact@v4
+              with:
+                  name: protocol-package
+                  path: metacall-protocol-*.tgz
+                  retention-days: 1
+
+    faas-tests:
+        name: Run FaaS Integration Tests
+        runs-on: ubuntu-latest
+        needs: package-protocol
+        steps:
+            - name: Setup NodeJs
+              uses: actions/setup-node@v4
+              with:
+                  node-version: 20
+
+            - name: Install MetaCall CLI
+              run: wget -O - https://raw.githubusercontent.com/metacall/install/master/install.sh | sh
+
+            - name: Checkout FaaS repo
+              uses: actions/checkout@v4
+              with:
+                  repository: metacall/faas
+                  path: faas
+
+            - name: Download Protocol Package
+              uses: actions/download-artifact@v4
+              with:
+                  name: protocol-package
+                  path: faas/
+
+            - name: Install deps with local Protocol
+              working-directory: faas
+              run: |
+                  npm i
+                  npm uninstall @metacall/protocol
+                  npm i ./metacall-protocol-*.tgz
+
+            - name: Build FaaS
+              working-directory: faas
+              run: npm run build
+
+            - name: Allow tgz in Docker build
+              working-directory: faas
+              run: echo '!*.tgz' >> .dockerignore
+
+            - name: Run Integration tests
+              working-directory: faas
+              run: npm run integration
+
+    deploy-tests:
+        name: Run Deploy Tests
+        runs-on: ubuntu-latest
+        needs: package-protocol
+        steps:
+            - name: Setup NodeJs
+              uses: actions/setup-node@v4
+              with:
+                  node-version: 24
+
+            - name: Install MetaCall CLI
+              run: wget -O - https://raw.githubusercontent.com/metacall/install/master/install.sh | sh
+
+            - name: Checkout Deploy repo
+              uses: actions/checkout@v4
+              with:
+                  repository: metacall/deploy
+                  path: deploy
+
+            - name: Download Protocol Package
+              uses: actions/download-artifact@v4
+              with:
+                  name: protocol-package
+                  path: deploy/
+
+            - name: Install deps with local Protocol
+              working-directory: deploy
+              run: |
+                  npm i
+                  npm uninstall @metacall/protocol
+                  npm i ./metacall-protocol-*.tgz
+
+            - name: Build Deploy
+              working-directory: deploy
+              run: npm run build
+
+            - name: Run unit tests
+              working-directory: deploy
+              run: npm run unit