---
title: 'Next-Gen WAF: Added detector_scope to simulator signal responses'
summary: null
url: >-
  https://www.fastly.com/documentation/reference/changes/2026/06/add-ngwaf-simulator-detector-scope
---

The [Next-Gen WAF Simulate API](https://www.fastly.com/documentation/reference/api/ngwaf/simulate/) now includes a `detector_scope` field on every signal in the simulation response, achieving parity with the `/requests/{id}` API. The field indicates whether a signal was detected by a `system` (built-in WAF rule), `workspace` (workspace-level custom rule), `account` (account-level custom signal), or `unknown` scope detector.

The request body size limit has also increased from 100 KB to 200 KB to accommodate reconstructed requests used in the import flow.