Automate cleanup of unsigned and stale draft pull requests

.github/workflows/community_pr_cleanup.yml

@@ -0,0 +1,59 @@
+# Warn and close pull requests that remain in draft without new commits, and
+# close unsigned community pull requests that have not engaged about CLA trouble.
+
+name: Community PR Cleanup
+
+on:
+  schedule:
+    - cron: "30 8 * * *"
+  workflow_dispatch:
+    inputs:
+      dry-run:
+        description: "Print what would be done without actually posting comments or closing pull requests"
+        type: boolean
+        default: true
+
+permissions:
+  contents: read
+
+concurrency:
+  group: community-pr-cleanup
+  cancel-in-progress: true
+
+jobs:
+  cleanup:
+    if: github.repository == 'zed-industries/zed'
+    runs-on: namespace-profile-2x4-ubuntu-2404
+    timeout-minutes: 15
+
+    steps:
+      - name: Generate app token
+        id: app-token
+        uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859 # v3.0.0
+        with:
+          app-id: ${{ secrets.ZED_COMMUNITY_BOT_APP_ID }}
+          private-key: ${{ secrets.ZED_COMMUNITY_BOT_PRIVATE_KEY }}
+          owner: zed-industries
+          repositories: zed
+          permission-issues: write
+          permission-pull-requests: write
+
+      - name: Checkout repository
+        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        with:
+          sparse-checkout: |
+            script/github-pr-cleanup.py
+          sparse-checkout-cone-mode: false
+
+      - name: Set up Python
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
+        with:
+          python-version: "3.12"
+
+      - name: Install dependencies
+        run: pip install requests
+
+      - name: Clean up pull requests
+        env:
+          GITHUB_TOKEN: ${{ steps.app-token.outputs.token }}
+        run: python script/github-pr-cleanup.py ${{ inputs.dry-run && '--dry-run' || '' }}

.github/workflows/slack_notify_community_automation_failure.yml

@@ -13,6 +13,7 @@ on:
       - "Comment on potential duplicate bug/crash reports"
       - "Track duplicate bot effectiveness"
       - "Community PR Board"
+      - "Community PR Cleanup"
       - "PR Board Meta Fields Refresh"
       - "PR Issue Labeler"
       - "Guild Assignment Status"