The author shares their experience using Claude Code with the --dangerously-skip-permissions flag, which allows the tool to operate without asking for permission on various tasks. While this enhances workflow efficiency, it raises significant risks, particularly regarding filesystem integrity. To mitigate these risks, the author explores different isolation methods but finds Docker impractical due to its complexity and security concerns. Instead, they turn to Vagrant, a tool for creating reproducible virtual machine environments that offers better isolation without the complications associated with Docker. Using Vagrant, the author sets up a virtual machine running Ubuntu 24.04, which allows Claude Code to execute commands and install packages freely while preserving system safety. The Vagrantfile they created includes specifications for resource allocation and necessary installations, such as Docker and Node.js. Initial challenges included high CPU usage from a known VirtualBox bug, but once resolved, the setup proved efficient. The VM runs smoothly, allowing Claude to perform tasks like starting web applications or managing databases without user intervention. The author emphasizes the safety of this setup. While it protects against accidental filesystem changes and aggressive package installations, it does not safeguard against potential data loss or network vulnerabilities. This is a practical solution for users who want to leverage Claude Code’s capabilities without risking their primary environment. The Vagrant setup is straightforward, allowing users to quickly sandbox their projects and minimize potential mishaps when using powerful automation tools.