Prove the flow

Feature branch → staging

git checkout staging
git pull
git checkout -b feature/hello-preview
# make a small visible change on the home page
git add .
git commit -m "feat: visible preview change for amplify lab

Bump homepage copy so the PR preview is easy to recognize."
git push -u origin feature/hello-preview

1. Open a pull request into staging
2. Wait for GitHub CICI
   GitHub Actions checks plus branch protection - required before merge. Amplify does not wait for CI by itself; it builds on push. to pass
3. Confirm Amplify builds a PR previewPR preview
   Temporary Amplify hosting URL created for a pull request so you can review the built site before merge. - open https://pr-<n>.<app-id>.amplifyapp.com
4. Merge the PR
5. Confirm https://staging.<app-id>.amplifyapp.com shows the change
6. Delete the feature branch (local and remote) and confirm the preview disappears if auto-delete is on

Staging → main

1. Open a pull request from staging into main
2. Wait for CI
3. Merge
4. Confirm https://main.<app-id>.amplifyapp.com matches staging

Tip

Keep a short checklist with your app id and the three URL patterns. Reuse it whenever you teach or screenshot this lab.

Success criteria

• PR preview URL served the feature change
• Staging URL updated after merge to staging
• Main URL updated after merge to main
• Preview host gone after branch delete (with auto-delete enabled)
• No custom domain required

Next: Teardown.