# HarnessRouter Integration Docs

> Quick start for adding HarnessRouter to a product with a coding agent.

Canonical URL: https://harnessrouter.ai/docs
Agent copy target: https://harnessrouter.ai/agents.md

Use this page as a concise quick-start summary. To implement HarnessRouter in a product, copy the complete AGENTS.md instructions from https://harnessrouter.ai/agents.md into Codex, Claude Code, or another coding agent.

## Quick start

### 1. Paste into your coding agent

Copy the official instructions and paste them into Codex, Claude Code, or another coding agent.

### 2. Ask it to build

Describe the product or feature you want. The coding agent will build the host product and add the server-side HarnessRouter integration.

### 3. Add your API key securely

When the coding agent opens a secure secret modal, create a Workspace API key and paste it into that modal. The agent stores it as HR_API_KEY and continues the build.

## Security Note

Paste the key only into the secure modal opened by your coding agent. Never paste it into normal chat, source files, AGENTS.md, browser code, logs, or screenshots.

## Key Resources

- [AGENTS.md](https://harnessrouter.ai/agents.md): Canonical implementation instructions.
- [Harness catalog](https://harnessrouter.ai/docs/harnesses.md): Harness IDs, status, and source-backed references.
- [Guides](https://harnessrouter.ai/guides): Architecture and integration guides.