# An Documentation

> An is agent infrastructure for shipping AI agents inside your product. Configure, deploy, and observe production-grade agents with a beautiful built-in UI. Works with Claude Code and OpenAI Codex runtimes.

An provides: agent-as-a-service runtime, SSE streaming, E2B sandboxed execution, tool orchestration, visual theme presets (Notion / Cursor / Minimal), skills system for on-demand context, a logs dashboard for debugging, and per-dialog cost tracking.

## Getting Started

- [Introduction](https://an.dev/docs): Overview of An — agent infrastructure for your product
- [Try It Out](https://an.dev/docs/try-it-out): Interactive demo of the agent chat interface
- [Get Started](https://an.dev/docs/get-started): Create an agent, deploy it, and add it to your Next.js app
- [Core Concepts](https://an.dev/docs/core-concepts): Agents, skills, projects, dialogs, and the Relay runtime — how the pieces fit together
- [Build & Deploy](https://an.dev/docs/agent-projects): Build, configure, and deploy agents. Project structure, agent() configuration, CLI commands, and how code and dashboard responsibilities are split.
- [Templates](https://an.dev/docs/templates): Pre-built agent templates to get started quickly — chat apps, form filling, email agents, note takers, and monitoring

## Customization

- [Agents](https://an.dev/docs/customization/agents): Available runtimes, models, tools, permission modes, and attachment settings
- [Skills](https://an.dev/docs/customization/skills): Reusable instruction blocks for on-demand agent context
- [System Prompts](https://an.dev/docs/customization/system-prompts): Configure agent behavior with custom system prompts and instructions
- [Themes](https://an.dev/docs/customization/themes): Theme presets and custom theme configuration

## Dashboard

- [Logs](https://an.dev/docs/logs): Browse individual chat sessions, inspect dialogs, and debug errors in real time
- [Observability](https://an.dev/docs/observability): Monitor agent activity, track costs and token usage, and identify issues

## Reference

- [API Reference](https://an.dev/docs/api-reference): REST endpoints, streaming, and SDK integration