ENGINEERING
Scheduled canary soak: hold Vercel promotion until crash-free holds steady
Runs on a schedule after a canary deploy, repeatedly samples the canary release's crash-free rate over a soak window.
How it runs
The automated pipeline, trigger to output.
- TriggerScheduled soak-interval check after canary deploy
- ActionSample canary crash-free rate vs baselineSentry
- LogicEvaluate soak window and per-sample health
- ActionPost hold comment on Vercel if sample regressesVercel
- OutputPost promotion-ready comment when soak passesVercel
What it does
Enforces a soak period before promotion. Instead of judging release health the instant a deploy lands, this scheduled workflow samples the canary release's crash-free rate over time and compares each sample to the stable baseline. Only after the canary holds healthy across the soak window does it mark the Vercel deployment ready; an early dip leaves a hold comment.
When to use it
Use it when crash data needs time to accumulate before it's trustworthy and you don't want to promote on a noisy first reading. Good for low-to-medium traffic services where a single early sample can mislead.
How it works
- 1A schedule fires at each soak interval after the canary deploy.
- 2The flow reads the canary release's current crash-free rate and baseline from Sentry.
- 3A logic step records the sample and checks whether the full soak window has passed with all samples above baseline.
- 4If a sample regresses, it posts a hold comment on the Vercel deployment.
- 5Once the window completes clean, it posts a promotion-ready comment on the Vercel deployment.
Set it up
What you configure once, before turning it on.
- 1Connect SentryErrors, performance, releases.
- 2Connect VercelDeploys, runtime logs, analytics.
- 3Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
- 4Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
- 5Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.
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