Nothing exotic: - A NAT gateway was added - An RDS replica count increased - No alarms fired - No dashboards changed

The PR would have merged like any other infra change.

We built a small tool that runs cost checks directly in PRs: - Shows a before → after cost estimate - Flags high-risk patterns (unbounded loops, chatty APIs, over-provisioned infra) - Optionally blocks merges on policy thresholds

We put together a public demo repo where you can open a PR and see the cost feedback:

https://github.com/CloudVerse-Pte-Ltd/devx-cost-regression-demo

Curious how others handle cost regressions at code-review time.