A crabbox run command leases a brokered cloud machine, reuses a static SSH host, or delegates to a sandbox provider, syncs your tracked and nonignored local files, executes the command remotely, streams stdout and stderr back, and releases or unclaims the target. Behind the scenes a small Cloudflare-hosted broker owns cloud provider credentials, lease state, cleanup, usage, and cost guardrails so individual machines and CLIs never need to.