---
title: Content set extensions.
description: The documentation engineering team will on occasion built extensions for specific use-cases. These extension needs to be explicitly opted into since they...
url: https://docs-v3-preview.elastic.dev/docs-builder/documentation/isolated/extensions
products:
  - Elastic Docs Builder
---

# Content set extensions.
The documentation engineering team will on occasion built extensions for specific use-cases.
These extension needs to be explicitly opted into since they typically only apply to a few content sets.

## Detection Rules Extensions

For the TRADE team the team built in support to picking up detection rule files from the source and emitting
documentation and navigation for them.
To enable:
```yaml
extensions:
  - detection-rules
```

This now allows you to use the special `detection_rules` instruction in the [Table of Contents](https://docs-v3-preview.elastic.dev/docs-builder/documentation/isolated/navigation)
As a means to pick up `toml` files as `children`
```yaml
toc:
  - file: index.md
    detection_rules: '../rules'
```