What problem does it solve? Running the claude-dev-env installer directly writes into your real ~/.claude/ and ~/.agents/ directories and mutates global git config, making it risky to test or verify. This Skill provides a sandboxed smoke driver and clear run/test instructions so the installer can be exercised without touching real configuration. ## Core Features & Use Cases - Sandboxed Smoke Testing: The driver.mjs harness redirects HOME, USERPROFILE, and GIT_CONFIG_GLOBAL to a throwaway directory, then runs the --help, install, and --uninstall lifecycle with 21 assertions. - Real Install Guidance: Documents the human install path (node bin/install.mjs with --only, --update, --uninstall flags) and its side effects. - Troubleshooting Reference: Covers Python detection failures, git dubious-ownership errors, malformed settings.json, and Windows network-share npm issues. - Use Case: After modifying bin/install.mjs, run the driver to confirm a full install lands skills, agents, hooks, rules, and a manifest correctly, and that --uninstall removes every tracked file. ## Quick Start Run the claude-dev-env smoke driver to verify the installer works end to end against a sandbox home directory.