Add comment in workflow

Author: pamelafox

.github/workflows/evaluate.yaml

@@ -46,6 +46,17 @@ jobs:
         run: |
           echo "Comment contains #evaluate hashtag"
 
+      - name: Comment on pull request
+        uses: actions/github-script@v7
+        with:
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: "Starting evaluation! Check the Actions tab for progress, or wait for a comment with the results."
+            })
+
       - uses: actions/checkout@v4
 
       - name: Install pgvector