diff --git a/.github/workflows/sync-upstream.yml b/.github/workflows/sync-upstream.yml
index 7b2ddd7..0c16387 100644
--- a/.github/workflows/sync-upstream.yml
+++ b/.github/workflows/sync-upstream.yml
@@ -5,8 +5,14 @@ on:
     - cron: '0 0 * * *'  # Nightly at midnight UTC
   workflow_dispatch:  # Allow manual trigger
 
+permissions:
+  contents: write
+  pull-requests: write
+
 jobs:
   sync:
+    # Disabled due to repeated merge-conflict failures in automation; run manually if needed.
+    if: false
     runs-on: ubuntu-latest
     steps:
       - name: Checkout