ci: stale issues

.github/workflows/stale-issues.yml

@@ -0,0 +1,29 @@
+name: "Auto-close stale issues"
+
+on:
+  schedule:
+    - cron: "30 1 * * *" # Daily at 1:30 AM
+  workflow_dispatch:
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - uses: actions/stale@v10
+        with:
+          days-before-stale: 90
+          days-before-close: 7
+          stale-issue-label: "stale"
+          close-issue-message: |
+            [automated] Closing due to 90+ days of inactivity.
+
+            Feel free to reopen if you still need this!
+          stale-issue-message: |
+            [automated] This issue has had no activity for 90 days.
+
+            It will be closed in 7 days if there's no new activity.
+          remove-stale-when-updated: true
+          exempt-issue-labels: "pinned,security,feature-request,on-hold"
+          start-date: "2025-12-27"