Try output

.github/workflows/presubmit-metadata.yaml

@@ -18,8 +18,17 @@ jobs:
           echo 'Verifying allowed keywords ...'
           # Don't fail because of grep
           set +o pipefail
-          {find ./images -name '*metadata.yaml' | while read -r file; do 
+          find ./images -name '*metadata.yaml' | while read -r file; do 
             if yq eval '.keywords[]' "$file" | grep -voE '(application|base|fips|ai|ai-gpu|stigs|featured)'; then
-              echo "$file" has keywords that are not on allow list. Please update.
+              cat "$file" has keywords that are not on allow list. Please update. >> output_log.txt
             fi
-          done} >> $GITHUB_OUTPUT
+          done
+      - name: Output results
+        shell: bash
+        id: output-results
+        run: |
+          set -e
+          if [ -s output_log.txt ]; then
+            cat output_log.txt >> $GITHUB_OUTPUT
+            exit 1
+          fi