# Coop – Isolated VM Environments for Running Claude Code and Codex

> Source: <https://github.com/trailofbits/coop>
> Published: 2026-09-07 04:18:28+00:00

Isolated VM environments for running Claude Code and Codex.

**Pronunciation:** "coop" (/kuːp/) — one syllable, rhymes with "loop", like the thing you keep chickens in. Not "co-op".

coop is a Rust CLI that manages disposable virtual machines where Claude Code and Codex have full tool access: Docker, git, compilers, package managers, all without risk to your host machine. Each VM is isolated, reproducible, and cheap to create and destroy.

Install the latest release:

```
curl -fsSL https://raw.githubusercontent.com/trailofbits/coop/main/install.sh | bash
```

Or build from source (requires [Rust](https://rustup.rs/)):

```
cargo build --release
cp target/release/coop /usr/local/bin/
```

Then build the VM template image:

```
coop setup
```

On Linux, `coop setup` also installs Firecracker and fetches a guest kernel. On macOS, install Lima first (`brew install lima`) — setup fails without it. coop is tested on macOS arm64 (Apple Silicon) and Linux x86_64; Linux arm64 builds are available but untested. Each backend has its own host requirements — see [Prerequisites](/trailofbits/coop/blob/main/docs/getting-started.md#prerequisites).

Keep coop updated:

```
coop update
```

See [`coop update`](/trailofbits/coop/blob/main/docs/commands.md#update) and the [`updates` config section](/trailofbits/coop/blob/main/docs/configuration.md#updates-section).

Start an instance for the current project and launch an agent CLI:

```
cd ~/code/my-project
coop up
coop claude
# or
coop codex
```