What's in a Sandbox

Every Sandbox starts from an image with the tools below already installed.

Operating system

OS	Notes
Ubuntu 24.04 LTS (Noble)	Default
Ubuntu 22.04 LTS (Jammy)	Select with `os: ubuntu:22.04` in YAML or `--os ubuntu:22.04` in the CLI

System packages are kept up to date.

Languages and runtimes

Tool	Version
Node.js (with `npm`, `npx`)	24
`tsx`	latest
Go	1.25
Python (with `pip`, `venv`)	3.12 on Ubuntu 24.04, 3.10 on Ubuntu 22.04
GCC, G++, Make	via `build-essential`

Docker

Docker Engine 29
Docker Buildx
Docker Compose (docker compose)

Docker runs without sudo.

Developer tools

git
curl
wget
rsync
jq
ripgrep (rg)
lsof
nano
screen
unzip
xz
gnupg
OpenSSH server

AI coding agent

Claude Code - preinstalled, runs in the /buddy working directory.

Buddy CLI

bdy - the Buddy CLI, preinstalled and authenticated for your Sandbox.
this - a shortcut for managing the current Sandbox from inside it.

bash
this endpoint add 3000                       # public endpoint
this endpoint add 3000 --auth user:password  # endpoint with HTTP basic auth
this endpoint add 3000 --buddy               # endpoint behind Buddy login
this snapshot create                         # snapshot the Sandbox
this status                                  # Sandbox status
bdy sb --help                                # all Sandbox commands
$$$$$$

User and environment

User: buddy, with passwordless sudo. Anything missing: sudo apt install <package>.
Working directory: /buddy. New shells start here.
Git over SSH: your Git author and committer identity is passed through, so commits made over SSH are attributed to you.

Last modified on Oct 7, 2026

Configuration Lifecycle