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

# Introduction

**Nuclei** is based on the concepts of `YAML` based template files that define how the requests will be sent and processed. This allows easy extensibility capabilities to nuclei.

The templates are written in `YAML` which specifies a simple human-readable format to quickly define the execution process.

<Card title="Get Started" icon="book-open">
  Guide to write your own nuclei template
</Card>