From a4d7ae12f0af853da5d09a2bf51a872355a73ee2 Mon Sep 17 00:00:00 2001
From: Alex Yang <himself65@outlook.com>
Date: Thu, 4 Sep 2025 15:35:39 -0700
Subject: [PATCH] ci: main branch protection (#4443)

---
 .github/workflows/main-protect.yml | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 .github/workflows/main-protect.yml

diff --git a/.github/workflows/main-protect.yml b/.github/workflows/main-protect.yml
new file mode 100644
index 00000000..b9d8dc36
--- /dev/null
+++ b/.github/workflows/main-protect.yml
@@ -0,0 +1,18 @@
+name: Main Branch Protection
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  check-branch:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check branch
+        run: |
+          if [[ ${GITHUB_HEAD_REF} != canary ]] && ! [[ ${GITHUB_HEAD_REF} =~ ^v[0-9]+\.[0-9]+\.[0-9]+-staging$ ]];
+          then
+            echo "Error: Pull request must come from 'canary' or 'v*.*.*-staging' branch"
+            exit 1
+          fi