# Custom sandboxes

> Bring your existing stack, from Rails and Java to Go, Python and Node.

Not every project starts from scratch. Custom sandbox images wrap AI-assisted engineering around the stack you already run.

## What it supports

Custom sandboxes are built for existing codebases in Rails, Java, Go, Python, Node and multi-process backends. Your codebase keeps its structure, and Automo works inside it.

## How changes land

Every AI change lands as a governed branch. Human approvals happen before merge, and [Guardrails](/build/guardrails) policies apply as they would to any other project.

## When to use one

- You want AI help on a codebase that is not React and Supabase.
- You are modernising a legacy system in steps.
- Your team needs changes reviewed in its usual way before they ship.

Setting up a custom sandbox usually involves your team. See [Custom sandbox images](https://automo.build/platform/custom-sandboxes) on the website, or talk to Automo through [automo.build](https://automo.build/contact).

Next: [Building over WhatsApp](/build/whatsapp).