ci: only notify Slack on drift detection or failure, not on clean runs

Author: jpr5

.github/workflows/test-drift.yml

@@ -67,22 +67,21 @@ jobs:
           if-no-files-found: warn
           retention-days: 30
 
-      - name: Notify Slack
-        if: always()
+      - name: Notify Slack on drift or failure
+        if: always() && job.status != 'success'
         run: |
-          if [ "${{ steps.drift.outputs.exit_code }}" = "2" ]; then
-            EMOJI="🚨"
-            MSG="*Drift detected* in aimock — providers changed response formats. <https://github.com/CopilotKit/aimock/actions/runs/${{ github.run_id }}|View run>"
-          elif [ "${{ job.status }}" = "success" ]; then
-            EMOJI="✅"
-            MSG="Drift tests passed — all providers match."
-          else
-            EMOJI="❌"
-            MSG="*Drift tests failed* (infra error). <https://github.com/CopilotKit/aimock/actions/runs/${{ github.run_id }}|View run>"
+          if [ -n "${{ secrets.SLACK_WEBHOOK }}" ]; then
+            if [ "${{ steps.drift.outputs.exit_code }}" = "2" ]; then
+              EMOJI="🚨"
+              MSG="*Drift detected* in aimock — providers changed response formats. <https://github.com/CopilotKit/aimock/actions/runs/${{ github.run_id }}|View run>"
+            else
+              EMOJI="❌"
+              MSG="*Drift tests failed* (infra error). <https://github.com/CopilotKit/aimock/actions/runs/${{ github.run_id }}|View run>"
+            fi
+            curl -s -X POST "${{ secrets.SLACK_WEBHOOK }}" \
+              -H "Content-Type: application/json" \
+              -d "{\"text\": \"${EMOJI} ${MSG}\"}"
           fi
-          curl -s -X POST "${{ secrets.SLACK_WEBHOOK }}" \
-            -H "Content-Type: application/json" \
-            -d "{\"text\": \"${EMOJI} ${MSG}\"}"
         env:
           SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}