From 81efed6ed3ed6ddb7639aee09b65862e01588da7 Mon Sep 17 00:00:00 2001
From: Pieter De Gendt <pieter.degendt@basalte.be>
Date: Tue, 28 Jul 2026 09:21:01 +0200
Subject: [PATCH] ci: add DCO check workflow

Add a Github action workflow for veryfying the DCO Signed-off-by for all
commits in a pull request.

Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>
---
 .github/workflows/dco.yml | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 .github/workflows/dco.yml

diff --git a/.github/workflows/dco.yml b/.github/workflows/dco.yml
new file mode 100644
index 00000000..5fb98198
--- /dev/null
+++ b/.github/workflows/dco.yml
@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: Copyright The Zephyr Project Contributors
+# SPDX-License-Identifier: Apache-2.0
+
+name: DCO Check
+
+on: [pull_request]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  dco-check:
+    name: Check DCO sign-off
+    runs-on: ubuntu-24.04
+    # The sign-off check for dependabot should be skipped
+    if: github.actor != 'dependabot[bot]'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          # Full history and the PR head so the action can resolve the base
+          # branch and merge-base (see actions/checkout#552).
+          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.sha }}
+          persist-credentials: false
+
+      - name: Check commit sign-off
+        uses: zephyrproject-rtos/action-dco@e3485a11e085fdc05fa4320e9cc3a86ccd665d89 # v1.0.0