diff --git a/.github/workflows/stale-branches.yml b/.github/workflows/stale-branches.yml
new file mode 100644
index 0000000..7915997
--- /dev/null
+++ b/.github/workflows/stale-branches.yml
@@ -0,0 +1,21 @@
+name: Stale Branches
+
+on:
+  schedule:
+    # Run daily at 2:00 AM UTC (10:00 AM Taiwan time)
+    - cron: "0 2 * * *"
+  workflow_dispatch: {} # Allow manual trigger
+
+jobs:
+  stale-branches:
+    name: Delete Stale Branches
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: read
+    steps:
+      - uses: crs-k/stale-branches@v8.2.2
+        with:
+          days-before-stale: 7
+          days-before-delete: 7
+          pr-check: true