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

# STE developer AI CoPilot

> Speed up STE integration with the Developer AI CoPilot. Covers its three AI modes, what the package includes, intended use, and how to download and use it.

This Symmetry Tax Engine CoPilot is a folder you download and open in your AI-powered IDE. Its `AGENTS.md` and `CLAUDE.md` files tell your assistant how to work on your integration, and the packaged knowledge base, worked examples, and code templates give it the material to do so.

<Note>
  The modes, package contents, and IDE setup are covered once in [Developer AI CoPilots](/symmetry/ai/developer-ai-copilots). This page covers what's specific to this one.
</Note>

## What this CoPilot knows

Its Advisor knowledge base is built on the complete STE API schema as source of truth. It carries validated request and response examples for every endpoint — `payCalc`, `locationCode`, `locationTax`, `setTaxList`, and the rest. Workflow tutorials cover the full calculation sequence.

Engineer templates ship for Python, TypeScript, Java, C#, and Go.

## Download it

The CoPilot is included with your Symmetry Tax Engine license and appears in the Download Center.

1. Sign in to the [Download Center](/symmetry/download-center/overview).
2. Find the STE Developer AI CoPilot in your available downloads.
3. Download the latest versioned package — `ste-developer-ai-copilot-<version>.zip`, for example `ste-developer-ai-copilot-2026.7.1.zip` — and extract it.
4. Open the extracted folder in your AI-powered IDE.

If you don't see it in the Download Center, [contact support](https://support.symmetry.com/hc/en-us/requests/new) to have it enabled for your account.

## Related

<CardGroup cols={2}>
  <Card title="How CoPilots work" icon="robot" href="/symmetry/ai/developer-ai-copilots">
    Modes, package contents, setup, and what a CoPilot is not.
  </Card>

  <Card title="STE MCP" icon="plug" href="/ste/ai-interfaces/mcp-overview">
    Query the tax engine in plain English from your AI tools.
  </Card>
</CardGroup>