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

# Introduction

> Welcome to the new home for your documentation

## What is Reactif?

Reactif is a remote configuration tool built natively for .NET. It lets you push config changes to your running [ASP.NET](http://ASP.NET) Core apps in under 10ms.

Unlike other remote config tools that bolt on a .NET SDK as an afterthought, Reactif plugs directly into `IConfiguration` as a configuration source. That means everything you already use just works:

* `IOptions<T>` and `IOptionsMonitor<T> ->`no new APIs to learn
* Strongly typed config objects → no magic strings
* Instant push via persistent SSE connection → no polling
* Fallback to last known values if connection drops → your app never crashes

### **The problem it solves**

You have a feature that needs to be disabled immediately. Or a rate limit that needs adjusting. Or a kill switch that needs flipping. Without Reactif, that means a code change, a PR, a deploy, and downtime risk. With Reactif, it's a dashboard click that propagates in under 10ms.

### **What it is not**

Reactif is not a secrets manager. Don't store connection strings, passwords, or API keys in Reactif. Use Azure Key Vault or Infisical for that. Reactif is for runtime behavior config — feature flags, thresholds, toggles, values that change frequently and need to propagate instantly.

<Card title="Quickstart" icon="rocket" horizontal href="/quickstart">
  Get the SDK wired in under 5 minutes
</Card>

<Card title="Core Concepts" icon="lightbulb" horizontal>
  understand projects, environments, and keys
</Card>

<Card icon="sparkles" />

## Make it yours

Design a docs site that looks great and empowers your users.

<Columns cols={2}>
  <Card title="Edit locally" icon="pen-to-square" href="/development">
    Edit your docs locally and preview them in real time.
  </Card>

  <Card title="Customize your site" icon="palette" href="/essentials/settings">
    Customize the design and colors of your site to match your brand.
  </Card>

  <Card title="Set up navigation" icon="map" href="/essentials/navigation">
    Organize your docs to help users find what they need and succeed with your product.
  </Card>

  <Card title="API documentation" icon="terminal" href="/api-reference/introduction">
    Auto-generate API documentation from OpenAPI specifications.
  </Card>
</Columns>

## Create beautiful pages

Everything you need to create world-class documentation.

<Columns cols={2}>
  <Card title="Write with MDX" icon="pen-fancy" href="/essentials/markdown">
    Use MDX to style your docs pages.
  </Card>

  <Card title="Code samples" icon="code" href="/essentials/code">
    Add sample code to demonstrate how to use your product.
  </Card>

  <Card title="Images" icon="image" href="/essentials/images">
    Display images and other media.
  </Card>

  <Card title="Reusable snippets" icon="recycle" href="/essentials/reusable-snippets">
    Write once and reuse across your docs.
  </Card>
</Columns>

## Need inspiration?

<Card title="See complete examples" icon="stars" href="https://mintlify.com/customers">
  Browse our showcase of exceptional documentation sites.
</Card>