Add automatic issue closure to Check for Copilot Model Updates workflow

.github/workflows/check-models.yml

@@ -6,6 +6,8 @@ on:
     paths:
         - .github/workflows/check-models.yml
         - .github/scripts/scrape-models.sh
+        - src/tokenEstimators.json
+        - src/modelPricing.json
 
   schedule:
     - cron: '11 17 * * 1' # Run every Monday at 5:11 PM UTC
@@ -180,3 +182,44 @@ jobs:
               });
               console.log('Created a new GitHub issue for missing models.');
             }
+
+      - name: Close GitHub Issue if all models are up-to-date
+        if: steps.check_missing.outputs.needs_update == 'false'
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const { owner, repo } = context.repo;
+
+            // Find open issues with the specific title and labels
+            const { data: issues } = await github.rest.issues.listForRepo({
+              owner,
+              repo,
+              state: 'open',
+              labels: 'maintenance',
+              creator: 'github-actions[bot]'
+            });
+
+            const title = '🤖 Action Required: Update Copilot Supported Models';
+            const existingIssue = issues.find(issue => issue.title === title);
+
+            if (existingIssue) {
+              // Close the issue with a comment
+              await github.rest.issues.createComment({
+                owner,
+                repo,
+                issue_number: existingIssue.number,
+                body: '✅ All Copilot models are now up-to-date. All models from the [GitHub Copilot documentation](https://docs.github.com/en/copilot/reference/ai-models/supported-models) are present in both `tokenEstimators.json` and `modelPricing.json`.\n\nClosing this issue automatically.'
+              });
+
+              await github.rest.issues.update({
+                owner,
+                repo,
+                issue_number: existingIssue.number,
+                state: 'closed'
+              });
+
+              console.log(`Closed issue #${existingIssue.number} as all models are now up-to-date.`);
+            } else {
+              console.log('No open issue found to close. All models are already up-to-date.');
+            }