Acarshub Tool Additions
sdr-enthusiasts/docker-acarshub
Use ONLY when working in the docker-acarshub repository AND a task may require adding a system tool, npm package, or other dependency.
Install npm packages in a Docker sandbox environment. An agent skill from github/awesome-copilot.
Install Sandbox npm Install
The automated check flagged lines worth reading first. See the safety section below.
$ npx skills add github/awesome-copilot --skill sandbox-npm-install -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install github/awesome-copilot sandbox-npm-install --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/sandbox-npm-install .claude/skills/sandbox-npm-install && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "sandbox-npm-install" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/sandbox-npm-install into .claude/skills/sandbox-npm-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sandbox-npm-install", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/github/awesome-copilot/tree/main/skills/sandbox-npm-installType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add github/awesome-copilot --skill sandbox-npm-install -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install github/awesome-copilot sandbox-npm-install --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/sandbox-npm-install .agents/skills/sandbox-npm-install && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "sandbox-npm-install" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/sandbox-npm-install into .agents/skills/sandbox-npm-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sandbox-npm-install", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add github/awesome-copilot --skill sandbox-npm-install -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install github/awesome-copilot sandbox-npm-install --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/sandbox-npm-install .cursor/skills/sandbox-npm-install && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "sandbox-npm-install" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/sandbox-npm-install into .cursor/skills/sandbox-npm-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sandbox-npm-install", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/github/awesome-copilot.git --path skills/sandbox-npm-install--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add github/awesome-copilot --skill sandbox-npm-install -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install github/awesome-copilot sandbox-npm-install --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/sandbox-npm-install .gemini/skills/sandbox-npm-install && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "sandbox-npm-install" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/sandbox-npm-install into .gemini/skills/sandbox-npm-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sandbox-npm-install", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install github/awesome-copilot sandbox-npm-installInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add github/awesome-copilot --skill sandbox-npm-install -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/sandbox-npm-install .github/skills/sandbox-npm-install && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "sandbox-npm-install" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/sandbox-npm-install into .github/skills/sandbox-npm-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sandbox-npm-install", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add github/awesome-copilot --skill sandbox-npm-install -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install github/awesome-copilot sandbox-npm-install --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/sandbox-npm-install .opencode/skills/sandbox-npm-install && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "sandbox-npm-install" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/sandbox-npm-install into .opencode/skills/sandbox-npm-install/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sandbox-npm-install", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
sandbox-npm-install- GitHub stars
- 40k
- Used in
- 1 other repo
- Token cost
- ~951 tokens
- SKILL.md length
- 443 words
- Files
- 2 (incl. scripts)
- Skills in repo
- 417
- Repo updated
- First seen
- Licence
- MIT
At a glance
Install npm packages in a Docker sandbox environment. An agent skill from github/awesome-copilot.
- Works in 5 steps: Copies package.json, package-lock.json,… → Runs npm ci (or npm install if no… → Symlinks node_modules back into the… → …
- You need to install
- SKILL.md covers When to Use This Skill, Prerequisites, Background and Step-by-Step Installation, plus 4 more sections
- Runs Shell scripts from its folder; calls npm and bash
What it does
Sandbox npm Install is an agent skill from github/awesome-copilot, published by the product's own GitHub organization. Install npm packages in a Docker sandbox environment. Use this skill whenever you need to install, reinstall, or update nodemodules 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.
Its SKILL.md is about 950 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including scripts (for example `scripts/install.sh`).
It sits in DevOps & Cloud, covering Containers. It works with npm, Docker and Playwright. The repository describes itself as: Community-contributed instructions, agents, skills, and configurations to help you make the most of GitHub Copilot. The licence is MIT.
When your agent uses it
- You need to install
- Update nodemodules inside a container where the workspace is mounted via virtiofs
Example prompts
- “/sandbox-npm-install”
Requirements
- Node.js
- A Bash shell
- Docker
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Copies package.json, package-lock.json, and .npmrc (if present) to a local ext4 directory
- Runs npm ci (or npm install if no lockfile) on the local filesystem
- Symlinks node_modules back into the workspace
- Verifies known native binaries (esbuild, rollup, lightningcss, vite) if present
- Optionally installs Playwright browsers and system dependencies (uses sudo when available)
What it can do on your machine
Read from SKILL.md and the folder at commit 727ff2e. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 1 file in scripts/ (Shell), which the agent can run.
Shell commands in SKILL.md call:
npmbash
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use npm, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Sandbox npm Install loads about 951 tokens when it runs. Until then it costs about 91 tokens; SKILL.md has 443 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check: warnings
The automated check found patterns that need a careful read before installing.
- WarningMentions a credentials file (SSH keys, cloud or package-manager tokens)SKILL.md:43
ackage.json`, `package-lock.json`, and `.npmrc` (if present) to a local ext4 directory
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
SKILL.md
The full file from github/awesome-copilot at commit 727ff2e, republished under its MIT licence (© github). 443 words, ~951 tokens.
Download SKILL.mdSave it as
.claude/skills/sandbox-npm-install/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- sandbox-npm-install
- description
- 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.
Sandbox npm Install
When to Use This Skill
Use this skill whenever:
- You need to install npm packages for the first time in a new sandbox session
package.jsonorpackage-lock.jsonhas changed and you need to reinstall- You encounter native binary crashes with errors like
SIGILL,SIGSEGV,mmap, orunaligned sysNoHugePageOS - The
node_modulesdirectory is missing or corrupted
Prerequisites
- A Docker sandbox environment with a virtiofs-mounted workspace
- Node.js and npm available in the container
- A
package.jsonfile in the target workspace
Background
Docker sandbox workspaces are typically mounted via virtiofs (file sync between the host and Linux VM). Native Go and Rust binaries (esbuild, lightningcss, rollup, etc.) crash with mmap alignment failures when executed from virtiofs on aarch64. The fix is to install on the container's local ext4 filesystem and symlink back into the workspace.
Step-by-Step Installation
Run the bundled install script from the workspace root:
bash scripts/install.shCommon Options
| Option | Description |
|---|---|
--workspace <path> | Path to directory containing package.json (auto-detected if omitted) |
--playwright | Also install Playwright Chromium browser for E2E testing |
What the Script Does
- Copies
package.json,package-lock.json, and.npmrc(if present) to a local ext4 directory - Runs
npm ci(ornpm installif no lockfile) on the local filesystem - Symlinks
node_modulesback into the workspace - Verifies known native binaries (esbuild, rollup, lightningcss, vite) if present
- Optionally installs Playwright browsers and system dependencies (uses
sudowhen available)
If verification fails, run the script again — crashes can be intermittent during initial setup.
Post-Install Verification
After the script completes, verify your toolchain works. For example:
npm test # Run project tests
npm run build # Build the project
npm run dev # Start dev serverShow full SKILL.md (187 more words)Show less
Important Notes
- The local install directory (e.g.,
/home/agent/project-deps) is container-local and is NOT synced back to the host - The
node_modulessymlink appears as a broken link on the host — this is harmless sincenode_modulesis typically gitignored - Running
npm ciornpm installon the host naturally replaces the symlink with a real directory - After any
package.jsonorpackage-lock.jsonchange, re-run the install script - Do NOT run
npm ciornpm installdirectly in the mounted workspace — native binaries will crash
Troubleshooting
| Problem | Solution |
|---|---|
SIGILL or SIGSEGV when running dev server | Re-run the install script; ensure you're not running npm install directly in the workspace |
node_modules not found after install | Check that the symlink exists: ls -la node_modules |
| Permission errors during install | Ensure the local deps directory is writable by the current user |
| Verification fails intermittently | Run the script again — native binary crashes can be non-deterministic on first load |
Vite Compatibility
If your project uses Vite, you may need to allow the symlinked path in server.fs.allow. Add the symlink target's parent directory (e.g., /home/agent/project-deps/) to your Vite config so that Vite can serve files through the symlink.
© github, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (scripts) in skills/sandbox-npm-install of github/awesome-copilot.
- SKILL.md
- scripts/install.sh
Open the folder on GitHubat commit 727ff2e
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in github/awesome-copilot, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Sandbox npm Install next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Sandbox npm Install this skillgithub/awesome-copilot | 40k | 1 repos | ~951 | Automated safety check: Warn | MIT | |
| Acarshub Tool Additionssdr-enthusiasts/docker-acarshub | 117 | — | ~707 | Automated safety check: Pass | GPL-3.0 | |
| Project Releaseswimmwatch/cloakbrowser-mcp | 161 | — | ~1.9k | Automated safety check: Pass | MIT | |
| Project Docs Maintainerswimmwatch/cloakbrowser-mcp | 161 | — | ~569 | Automated safety check: Pass | MIT | |
| Redis Insight Pluginredis/RedisInsight | 8.9k | — | ~3.5k | Automated safety check: Pass | MIT | |
| Reflexo ReleaseMyriad-Dreamin/typst.ts | 1.2k | — | ~1.5k | Automated safety check: Pass | Apache-2.0 |
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Related
Works with
Categories
Questions about Sandbox npm Install
What does Sandbox npm Install do?
Install npm packages in a Docker sandbox environment. An agent skill from github/awesome-copilot. Sandbox npm Install is an agent skill from github/awesome-copilot, published by the product's own GitHub organization. Install npm packages in a Docker sandbox environment.
When should I use Sandbox npm Install?
Sandbox npm Install fits situations like: you need to install; update nodemodules inside a container where the workspace is mounted via virtiofs.
How do I install Sandbox npm Install in Claude Code?
Run `npx skills add github/awesome-copilot --skill sandbox-npm-install -a claude-code`. Or copy the skill folder (skills/sandbox-npm-install in github/awesome-copilot) into .claude/skills/sandbox-npm-install in your project. Claude Code loads it when a task matches its description.
How do I install Sandbox npm Install in Codex?
Run `npx skills add github/awesome-copilot --skill sandbox-npm-install -a codex`. Or copy the skill folder (skills/sandbox-npm-install in github/awesome-copilot) into .agents/skills/sandbox-npm-install in your project. Codex loads it when a task matches its description.
Can I use Sandbox npm Install in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add github/awesome-copilot --skill sandbox-npm-install -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sandbox-npm-install, .gemini/skills/sandbox-npm-install, .github/skills/sandbox-npm-install and .opencode/skills/sandbox-npm-install in your project.
What does Sandbox npm Install need to run?
Going by SKILL.md and its folder, Sandbox npm Install needs a shell for the scripts in its folder and the command-line tools its instructions call (npm and bash). Our summary lists: Node.js; A Bash shell; Docker.
Does Sandbox npm Install access the network?
SKILL.md contains no URLs. Its commands use npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Sandbox npm Install safe to install?
Our automated static check of SKILL.md flagged 1 warning(s): mentions a credentials file (ssh keys, cloud or package-manager tokens). Read the flagged lines before installing; the check is not a guarantee either way. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Sandbox npm Install use?
Sandbox npm Install is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Sandbox npm Install use?
About 951 tokens (SKILL.md is roughly 3.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Sandbox npm Install?
Skills that share tags, products or a category with Sandbox npm Install: Acarshub Tool Additions (sdr-enthusiasts/docker-acarshub, 117 stars), Project Release (swimmwatch/cloakbrowser-mcp, 161 stars), Project Docs Maintainer (swimmwatch/cloakbrowser-mcp, 161 stars) and Redis Insight Plugin (redis/RedisInsight, 8.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Sandbox npm Install?
github (a GitHub organization, an official publisher) maintains it in github/awesome-copilot, which has 39,748 GitHub stars. The repository holds 417 skills in this directory. The repository was last updated on October 7, 2026.
Source: github/awesome-copilot on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.