diff --git a/.github/workflows/ci-protobuf.yml b/.github/workflows/ci-protobuf.yml
new file mode 100644
index 00000000000..d832939ded9
--- /dev/null
+++ b/.github/workflows/ci-protobuf.yml
@@ -0,0 +1,36 @@
+name: CI ProtoBuf
+
+on:
+  pull_request:
+
+jobs:
+  buf-breaking:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+
+      - name: Setup buf
+        uses: bufbuild/buf-setup-action@35c243d7f2a909b1d4e40399b348a7fdab27d78d # v1.34.0
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Run buf breaking
+        uses: bufbuild/buf-breaking-action@c57b3d842a5c3f3b454756ef65305a50a587c5ba # v1.1.4
+        env:
+          REPO_URL: https://github.com/${{ github.repository }}
+          BASE_BRANCH: ${{ github.base_ref }}
+        with:
+          against: "${REPO_URL}.git#branch=${BASE_BRANCH}"
+
+      - name: Collect Metrics
+        if: always()
+        id: collect-gha-metrics
+        uses: smartcontractkit/push-gha-metrics-action@d9da21a2747016b3e13de58c7d4115a3d5c97935 # v3.0.1
+        with:
+          id: ci-protobuf
+          org-id: ${{ secrets.GRAFANA_INTERNAL_TENANT_ID }}
+          basic-auth: ${{ secrets.GRAFANA_INTERNAL_BASIC_AUTH }}
+          hostname: ${{ secrets.GRAFANA_INTERNAL_HOST }}
+          this-job-name: buf-breaking
+        continue-on-error: true
diff --git a/CODEOWNERS b/CODEOWNERS
index 8741cb7a685..5b80a90b27a 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -12,6 +12,7 @@
 # Services
 /core/services/directrequest @smartcontractkit/keepers
 /core/services/feeds @smartcontractkit/FMS
+/core/services/synchronization/telem @smartcontractkit/realtime
 
 # To be deprecated in Chainlink V3
 /core/services/fluxmonitorv2 @smartcontractkit/foundations