From 21155c0073736084b1df0fa3fd251178c3282c09 Mon Sep 17 00:00:00 2001
From: Ollie <oliver.hyde@wikimedia.de>
Date: Mon, 28 Sep 2026 17:45:13 +0100
Subject: [PATCH] Skip Mattermost notifications for external pull requests

---
 .github/workflows/mattermost.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/mattermost.yml b/.github/workflows/mattermost.yml
index 992f0fd31..b191700ca 100644
--- a/.github/workflows/mattermost.yml
+++ b/.github/workflows/mattermost.yml
@@ -5,7 +5,8 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    if: ${{ github.actor != 'dependabot[bot]' }}
+    # Don't run this job if the PR was created by Dependabot or from an external repository
+    if: ${{ github.actor != 'dependabot[bot]' && github.event.pull_request.head.repo.full_name == github.repository }}
     steps:
       - uses: mattermost/action-mattermost-notify@v2.1.0
         with: