Post-Deploy Smoke-Check Summary

Watches for successful production deployments on Vercel and immediately runs a smoke-check pass against the live build. It triggers your Datadog Synthetic tests for the critical paths (homepage, login, checkout, key API endpoints), waits for the results, and then posts a single, readable summary to Slack: which checks passed, which failed, response times, and a direct link back to the deployment. No more wondering whether the deploy that just went out is actually serving real traffic correctly.

Use this when you ship to production frequently and want fast confirmation that a deploy is healthy without anyone manually clicking through the app. It is ideal for teams practicing continuous deployment who need a tight feedback loop: the moment Vercel reports a deploy as ready, the workflow confirms the site is actually up and the golden paths work. Pair it with an on-call rotation so a failed smoke check turns into an immediate, actionable Slack alert instead of a customer complaint hours later.

A Vercel deployment-succeeded webhook starts the run and hands over the deployment URL and metadata. The workflow calls the Datadog API to trigger your designated Synthetic smoke tests against that URL, then polls until all results are in. It aggregates the outcomes — counting passes and failures, capturing latency and any error detail — and branches on the result. Either way it formats a compact summary (status emoji, per-check breakdown, deploy link) and sends it to your chosen Slack channel, flagging the message clearly when any check fails so the right people see it first.