> ## Documentation Index
> Fetch the complete documentation index at: https://docs.extend.ai/llms.txt
> Use this file to discover all available pages before exploring further.
>
> ## API version
> The current API version is `2026-02-09`, served at the site root (no version prefix in URLs).
> If this page URL contains `/2025-04-21/` or `/2024-12-23/`, you are reading an older API version.
> Prefer the current docs at https://docs.extend.ai/llms.txt unless the user explicitly needs that older version.
> Do not treat older-version pages as the source of truth for new integrations.

# Getting Started

> An overview of Extend and your first steps to building, configuring, and deploying AI document processors.

## What is Extend?

Extend is your platform for building, iterating on, evaluating, and deploying AI-powered document processing infrastructure. We support a variety of tasks like document extraction, splitting, classification, and parsing. These tasks are performed by **Processors**, which can then be orchestrated within **Workflows** to handle your document processing use cases.

## What do you want to do?

**Extract structured data from documents** *Recommended*\
→ [Quick Start: Build your first extraction processor](/2025-04-21/product/extraction/quick-start-5-minutes)

**Split multi-page documents into organized sections**\
→ [Configure a splitter](/2025-04-21/product/splitting/configuring-a-splitter)

**Just parse documents into clean, structured text**\
→ [Parse documents](/2025-04-21/product/parsing/parse)

**Categorize documents into different types**\
→ [Configure a classifier](/2025-04-21/product/classification/configuring-a-classifier)

**Orchestrate multiple processors into complex document pipelines**\
→ [Create a workflow](/2025-04-21/product/workflows/create-a-workflow)

**Test and measure how well your processors perform**\
→ [Overview of evaluation sets](/2025-04-21/product/evaluation/overview)

## Coding with an agent?

Use our curated platform context file to seed coding assistants with Extend platform context — open [`https://docs.extend.ai/agents.md`](https://docs.extend.ai/agents.md) (identical content whether you save it as `AGENTS.md` or `CLAUDE.md`):

```bash
# Codex, Cursor, and most harnesses
curl -fsSL https://docs.extend.ai/agents.md -o AGENTS.md

# Claude Code
curl -fsSL https://docs.extend.ai/agents.md -o CLAUDE.md
```

#### How do I use this?

1. Save the file in your project root as `CLAUDE.md` or `AGENTS.md`.
2. Run your coding agent from that same project root so it can discover the file.
3. If your agent does not auto-load root guidance, explicitly reference the file in your prompt (for example: "Use `./CLAUDE.md` for project instructions.").
4. For Codex/agent-style tools, keep `AGENTS.md` in the working directory root where commands are executed.
5. For Claude Code, keep `CLAUDE.md` at repository root and start the session from that directory.
6. In web LLM chats (for example ChatGPT, Claude, Gemini), upload `CLAUDE.md` or `AGENTS.md` as an attachment at the start of the conversation.
7. If attachments are not available, paste the file content into your first prompt and ask the model to follow it for the rest of the session.

> Ship your document processing with Extend. Get started with our APIs, SDKs, and guides.