Vercel Flags now displays live evaluation metrics directly on each flag's detail page. The view charts evaluations per minute over time and marks each flag version in the chart, letting you trace evaluation shifts to exact configuration changes.
You can filter and group evaluations by variant, reason, environment, SDK key, client, and reporting project. Custom clients gain a new clientName property on the initializer to surface as distinct groups, making it possible to verify rollout percentages, separate targeted matches from default fallbacks, and identify which projects are consuming a given flag.
Upgrade to @vercel/flags-core 1.6.0 or later. Metrics appear automatically, no additional configuration required. The full evaluation metrics documentation covers the filtering model and what each grouping dimension actually tells you, which is where the real operational value lives.
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