devvm puts every project in its own sandboxed VM with one command
Devvm.dev: One VM for every project
devvm is a free, open-source tool that spins up an isolated VM for each project folder, preloaded with the right toolchains and ready for Claude Code, Codex, or opencode. It ships sensible defaults: ports forward automatically, git identity carries over, and agents' secrets stay on your machine while a proxy injects them. New VMs default to an allowlisted network tier, and on macOS .git hooks are locked down. One command, no config.
You know you should run your code and agents in a sandbox, but most tools need configuration and setup that's hard to get right.