> ## Documentation Index
> Fetch the complete documentation index at: https://docs.kaireonai.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Summary Definitions (retired)

> This feature has been retired. Use Behavioral Metrics for computed aggregations instead.

<Warning>
  **Summary Definitions has been retired.** It let you configure aggregation shapes (dimensions, aggregates, time windows), but no aggregation engine in the platform ever read those definitions — it was an inert config surface. Use [Behavioral Metrics](/studio/behavioral-metrics) instead.
</Warning>

Behavioral Metrics is the platform's single working behavioral-aggregation surface: it materializes per-customer values — either in realtime (incrementing live on every impression/outcome event) or on a batch schedule — and feeds [Decisioning Gates](/decisioning/qualification-rules) via the `metric_condition` rule type. If you previously configured a Summary Definition, recreate the equivalent aggregation as a Behavioral Metric.

The read-only `GET /api/v1/summary-definitions` endpoint remains available (it powers the customer viewer's summaries filter) — see the [API reference](/api-reference/summary-definitions) for details.