Install npm packages in a Docker sandbox environment. Use this skill whenever you need to install, reinstall, or update node_modules inside a container where the workspace is mounted via virtiofs. Native binaries (esbuild, lightningcss, rollup) crash on virtiofs, so packages must be installed on the local ext4 filesystem and symlinked back.
Install
npx skills add github/awesome-copilot --skill sandbox-npm-installnpx skills add github/awesome-copilot --skill sandbox-npm-install -a claude-code -gnpx skills add github/awesome-copilot --skill sandbox-npm-install -a codex -ggemini skills install https://github.com/github/awesome-copilot.git --path skills/sandbox-npm-installgh skill install github/awesome-copilot sandbox-npm-installgit clone --depth 1 https://github.com/github/awesome-copilot /tmp/github__awesome-copilot
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/github__awesome-copilot/skills/sandbox-npm-install ~/.claude/skills/sandbox-npm-install # Claude Code
cp -R /tmp/github__awesome-copilot/skills/sandbox-npm-install ~/.agents/skills/sandbox-npm-install # Codex, Cursor, Gemini CLI, Copilot, OpenCode