What problem does it solve? Testing an installer that writes to real user configuration directories (~/.claude, ~/.agents, global Git config) risks corrupting the developer's live environment. This Skill runs the claude-dev-env installer against a throwaway sandbox home so install, uninstall, and hook registration can be verified safely. ## Core Features & Use Cases - Isolated installer verification: Runs --help, full install, and --uninstall with HOME, USERPROFILE, and GIT_CONFIG_GLOBAL redirected to a temporary sandbox, asserting 21 checks on the resulting tree. - Environment doctor: A read-only doctor command confirms Node 18+, Git, Python, the driver script, and the package directory are present before any verification run. - Feature maps and evidence: Per-feature verification guides under features/ cover hooks, Codex accounts, merge readiness, and privacy gates, with transcripts and doctor records stored as JSON evidence. - Use Case: After changing a hook registration in the installer, run the verify skill to confirm the sandboxed install produces the expected settings.json hook roster, skills pointer, and manifest without touching your real configuration. ## Quick Start Ask the AI to run the verify skill's installer check from the repository root using the verify-installer.mjs run command and report whether all checks passed.