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Deno Sandbox

Official
denoland·vlatest·backend·MIT

Executes Deno code in a secure, isolated environment, preventing malicious or unintended actions and offering safe experimentation.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add denoland/skills --skill deno-sandbox -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

denoland

Matched to the vendor's own GitHub organisation.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned denoland/skills at d5f6ace6b1.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
d5f6ace6b1
Manifest
skills/deno-sandbox/SKILL.md
Scanned
1 file, 381 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

The deno-sandbox skill provides a secure environment to execute Deno code within an AI agent. It allows agents to run Deno scripts without granting them full system access, isolating potentially untrusted code and preventing malicious actions. This enables the safe execution of tasks like data processing or interacting with external APIs through Deno's runtime.

When to use it

  • Running custom scripts: Execute user-provided Deno scripts for specific tasks within a controlled environment.
  • Data transformation: Safely process and transform data using Deno libraries without compromising system security.
  • API interaction: Interact with external APIs through Deno's built-in HTTP client in an isolated manner.
  • Code execution experiments: Test and run experimental Deno code snippets within a sandbox to prevent unintended consequences.

Key capabilities

  • Secure Deno script execution
  • Isolation from the host system
  • Controlled environment for untrusted code
  • Deno runtime support

Example prompts

  • "Run this Deno script: console.log('Hello, world!')"
  • "Execute this Deno code to fetch data from example.com and parse it as JSON."
  • "Can you run the following deno script that calculates the factorial of 10?"

Tips & gotchas

The AI agent needs access to a Deno runtime environment for this skill to function correctly. Ensure any dependencies required by the Deno scripts are available within the sandbox's context.