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firebreak

v0.0.1

Published

Thin npx launcher for the Firebreak Nix CLI

Vulnerabilities

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Links

Git

Maintainers

zvictorzvictor

Keywords

firebreaknixclimicrovmsandboxcodexclaude-codeopencode

Readme

Firebreak

Firebreak is a VM-first control plane for running coding agents with a small public interface.

Firebreak CLI

firebreak vms
firebreak run codex
firebreak run codex --shell
firebreak run claude-code -- --help

firebreak vms lists the public VM workloads. firebreak run <vm> launches one of them through the existing Firebreak VM packages.

Local Workloads

  • nix run .#firebreak-codex launches Codex in the local Firebreak VM
  • nix run .#firebreak-claude-code launches Claude Code in the local Firebreak VM
  • FIREBREAK_VM_MODE=shell nix run .#firebreak-codex reaches the maintenance shell for the same VM package

NPX Launcher

Firebreak ships a thin Node launcher so users can run the Nix-backed CLI with npx firebreak ....

npx firebreak vms
npx firebreak run codex
npx firebreak doctor
npx firebreak init

The launcher:

  • checks that the host is x86_64-linux
  • checks that nix is installed and callable
  • checks that /dev/kvm is usable before non-diagnostic commands
  • uses the local Firebreak checkout automatically when you run it inside a cloned Firebreak repo
  • falls back to github:skadaai/firebreak when no local Firebreak checkout is present
  • forwards all arguments to the existing Bash Firebreak CLI through nix run

Project Defaults

firebreak init is interactive by default and writes a project-local .firebreak.env file tailored to the answers you choose. The file uses the same KEY=VALUE spelling as the public environment variables, and real environment variables take precedence over file values.

nix run .#firebreak -- init
nix run .#firebreak -- init --non-interactive
nix run .#firebreak -- doctor

Example .firebreak.env:

AGENT_CONFIG=workspace
# FIREBREAK_VM_MODE=run
# CODEX_CONFIG=workspace
# CLAUDE_CONFIG=workspace

Diagnostics

firebreak doctor reports:

  • project root and config-file resolution
  • public VM mode resolution
  • Codex and Claude Code config resolution
  • current working directory compatibility
  • KVM availability and primary-checkout state

Use nix run .#firebreak -- doctor --json for machine-readable output.