---
title: "Documentation Generator Agent Code"
source: https://docs.autohand.ai/agent-sdk/tutorials/500-documentation-generator
---

# Build a Documentation Generator Agent

Learn how to create a coding assistant that automatically generates documentation from code with the Autohand Code Agent SDK. Available in TypeScript, Python, Java, Go, Swift, and Rust.

In this tutorial, you'll build a documentation generator coding assistant that reads source code, understands its structure, and automatically generates comprehensive documentation. This demonstrates how to use the Agent SDK for documentation maintenance.

**Prerequisites:**

-   Completed [Code Reviewer Agent](100-code-reviewer-agent.html)
-   Node.js 16+ (for TypeScript), Python 3.10+ (for Python), Java 11+ (for Java), Go 1.16+ (for Go), Swift 5.5+ (for Swift), or Rust 1.60+ (for Rust)
-   SDK installed for your chosen language
-   API key from your LLM provider (set as `AUTOHAND_API_KEY`)

## What You'll Build

A documentation generator coding assistant that:

-   Reads source code files
-   Identifies functions, classes, and methods
-   Generates README.md documentation
-   Creates inline code comments
-   Generates API documentation in Markdown
-   Updates existing documentation

## Step 1: Create Sample Code

Create a sample code file to document in your chosen language:

## Step 2: Create Documentation Agent

Create an agent with documentation generation capabilities in your chosen language:

## Step 3: Generate Documentation

Run the documentation generator agent on your sample code in your chosen language:

## Key Concepts

1

**Code Understanding**

The agent reads and analyzes source code to understand its structure and purpose.

2

**Documentation Generation**

Using WRITE\_FILE to create comprehensive README.md and documentation files.

3

**Inline Comments**

Using EDIT\_FILE to add inline documentation comments directly in source code.

4

**API Documentation**

Generating API documentation in Markdown format with examples.

## Complete Example

Here's the complete example with cleanup:

## Real-World Applications

This pattern can be applied to:

-   **API documentation:** Auto-generate API docs from source code
-   **README maintenance:** Keep project READMEs up to date automatically
-   **Code comments:** Add documentation to undocumented code
-   **Migration guides:** Generate documentation for version upgrades
-   **Onboarding:** Create developer onboarding documentation

## Next Steps

### 📁 View the Example

See the complete example in the SDK repositories.

[TypeScript Examples →](https://github.com/autohandai/agent-sdk-typescript/tree/main/examples)

### 🧪 Testing Agent

Learn how to build agents that generate automated tests.

[Next Tutorial →](600-testing-agent.html)

### 📚 Explore More

Check out all examples in the SDK repositories.

[Agent SDK Overview →](../overview.html)