Add auto-close functionality for duplicate issues

- Update dedupe command to include auto-close warning
- Add commit-push-pr command for streamlined workflow
- Add GitHub workflow to automatically close duplicates

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/auto-close-duplicates.yml

@@ -0,0 +1,95 @@
+name: Auto-close duplicate issues
+description: Auto-close issues marked as duplicates after 3 days if no response
+on:
+  schedule:
+    - cron: '0 9 * * *'
+
+jobs:
+  auto-close-duplicates:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: read
+      issues: write
+
+    steps:
+      - name: Auto-close duplicate issues
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const threeDaysAgo = new Date();
+            threeDaysAgo.setDate(threeDaysAgo.getDate() - 3);
+            
+            // Get all open issues
+            const { data: issues } = await github.rest.issues.listForRepo({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              state: 'open',
+              per_page: 100
+            });
+            
+            for (const issue of issues) {
+              // Get comments for this issue
+              const { data: comments } = await github.rest.issues.listComments({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: issue.number
+              });
+              
+              // Find duplicate comments (look for "Found 1 possible duplicate" or "Found X possible duplicate")
+              const dupeComments = comments.filter(comment => 
+                comment.body.includes('Found') && 
+                comment.body.includes('possible duplicate') &&
+                comment.user.type === 'Bot'
+              );
+              
+              if (dupeComments.length === 0) continue;
+              
+              // Get the most recent duplicate comment
+              const lastDupeComment = dupeComments[dupeComments.length - 1];
+              const dupeCommentDate = new Date(lastDupeComment.created_at);
+              
+              // Check if the duplicate comment is 3+ days old
+              if (dupeCommentDate > threeDaysAgo) continue;
+              
+              // Check if there are any comments after the duplicate comment
+              const commentsAfterDupe = comments.filter(comment => 
+                new Date(comment.created_at) > dupeCommentDate
+              );
+              
+              if (commentsAfterDupe.length > 0) continue;
+              
+              // Check if issue author reacted with thumbs down to the duplicate comment
+              const { data: reactions } = await github.rest.reactions.listForIssueComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                comment_id: lastDupeComment.id
+              });
+              
+              const authorThumbsDown = reactions.some(reaction => 
+                reaction.user.id === issue.user.id && reaction.content === '-1'
+              );
+              
+              if (authorThumbsDown) continue;
+              
+              // Auto-close the issue as duplicate
+              await github.rest.issues.update({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: issue.number,
+                state: 'closed',
+                state_reason: 'duplicate'
+              });
+              
+              // Add closing comment
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: issue.number,
+                body: `This issue has been automatically closed as a duplicate after 3 days with no response. If this was closed in error, please reopen it.
+
+🤖 Generated with Claude Code`
+              });
+              
+              console.log(`Auto-closed issue #${issue.number} as duplicate`);
+            }