Add comment when dependabot gets stale to recreate

Author: jonathanKingston

.github/workflows/dependabot-conflict-detector.yml

@@ -0,0 +1,44 @@
+name: Dependabot conflict detector
+
+on:
+  push:
+    branches: [main]
+
+permissions:
+  pull-requests: write
+
+jobs:
+  check-conflicts:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check Dependabot PRs for conflicts
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const { data: pulls } = await github.rest.pulls.list({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              state: 'open',
+            });
+
+            const dependabotPRs = pulls.filter(pr => pr.user.login === 'dependabot[bot]');
+
+            for (const pr of dependabotPRs) {
+              // Fetch full PR to get accurate mergeable status
+              const { data: fullPR } = await github.rest.pulls.get({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                pull_number: pr.number,
+              });
+
+              if (fullPR.mergeable === false) {
+                await github.rest.issues.createComment({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: pr.number,
+                  body: '@dependabot recreate',
+                });
+                console.log(`Requested recreate for PR #${pr.number}`);
+              }
+            }
+