diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 0ecafa039..a6d3d936e 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -76,3 +76,66 @@ jobs:
           sarif_file: lintrunner.sarif
           category: lintrunner
           checkout_path: ${{ github.workspace }}
+
+  copilot-fix-lint:
+    name: Copilot Fix Lint Errors
+    needs: lint-python-format
+    # Only run when lint-python-format fails on pull requests from the same repo (not forks)
+    if: >-
+      always()
+      && needs.lint-python-format.result == 'failure'
+      && github.event_name == 'pull_request'
+      && github.event.pull_request.head.repo.full_name == github.repository
+    runs-on: ubuntu-latest
+    concurrency:
+      group: copilot-fix-lint-pr-${{ github.event.pull_request.number }}
+      cancel-in-progress: true
+    permissions:
+      issues: write
+    steps:
+      - name: Request Copilot to fix lint errors
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const prNumber = context.payload.pull_request.number;
+            const marker = '<!-- copilot-lint-fix -->';
+
+            // Avoid duplicate comments on workflow re-runs by checking all comment pages
+            const comments = await github.paginate(
+              github.rest.issues.listComments,
+              {
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: prNumber,
+                per_page: 100,
+              },
+            );
+
+            if (comments.some(c => c.body?.includes(marker))) {
+              core.info('Copilot lint fix already requested; skipping.');
+              return;
+            }
+
+            const runUrl = `${context.serverUrl}/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId}`;
+
+            const body = [
+              marker,
+              '@copilot The lint check failed for this PR. Please fix all the lint errors and push the fixes to this branch.',
+              '',
+              `Failed workflow run: ${runUrl}`,
+              '',
+              'To reproduce and fix:',
+              '1. Run `lintrunner --all-files` to see all lint errors',
+              '2. Run `lintrunner --all-files -a` to auto-fix formatting issues',
+              '3. Manually fix any remaining lint errors that cannot be auto-fixed',
+              '4. Commit and push the fixes',
+            ].join('\n');
+
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: prNumber,
+              body: body,
+            });
+
+            core.info(`Requested Copilot to fix lint errors on PR #${prNumber}`);